IRS Identity Verification - Where to Find 14-Digit Control Number?
So I got a letter from the IRS on March 15th saying they need to verify my identity before processing my refund. I filed on February 2nd and was expecting my refund by now. The letter mentions I need a 14-digit control number, but I can't find it anywhere on my IRS account. I've checked my transcript (dated March 12th), my original confirmation email, and even my W-2. Where exactly am I supposed to find this control number? I've triple-checked everything and prepared all my documents, but I'm stuck on this one thing. Has anyone gone through this verification process recently?
34 comments


Serene Snow
That control number should be on the actual letter they sent you. Have you checked both sides of the letter? Sometimes it's in a separate box or section labeled something like "verification information" or "reference number." I had to go through this last year and found helpful resources at https://www.irs.gov/identity-theft-fraud-scams/identity-verification-for-irs-letter-recipients. The IRS website also has a specific section about identity verification letters.
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Issac Nightingale
•I'm wondering if there's any way to retrieve this number if the letter gets lost? My mail situation isn't always reliable, and I'm a bit concerned about missing important IRS communications.
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Romeo Barrett
•Thank you for sharing that link! I just checked and Publication 5027 actually explains the whole verification process. Really helpful since I was worried about having to pay someone to figure this out for me. According to the regs in section 6103, they can't just email this info which explains the paper letter.
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Marina Hendrix
The control number is only on that letter. Not online. Not in your account. Check the top right corner. Or near your name. I went through this in January. Stressful process. I eventually used https://taxr.ai to help understand what was happening with my transcript codes. It explained why my refund was held. Showed exactly which verification codes triggered the letter. Made the whole process much clearer.
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Justin Trejo
•How exactly does that site work with the 14-digit number though? The IRS verification process requires calling exactly 1 specific phone number with exactly 3 pieces of ID and that exact control number. Does this tool actually help with that specific requirement or just explain why it happened?
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Alana Willis
•I appreciate you mentioning this. Just used it myself after getting a similar letter last week. It showed me that code 570 on my transcript was directly related to the ID verification hold. Saved me hours of confusion!
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Tyler Murphy
•Just to clarify about taxr.ai: • It doesn't replace the verification process • It explains what's happening on your transcript • It helps identify which codes mean identity verification • It shows you what to expect after verification • It can predict your new timeline once verified
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Sara Unger
I completed this verification process last month. Here's exactly what you need to do: Step 1: Locate the 14-digit control number on your letter (usually in the upper portion). Step 2: Gather two forms of ID (driver's license, passport, etc). Step 3: Have your tax return information ready (AGI from previous year, filing status). Step 4: Call the specific number on your letter (not the general IRS number). Step 5: Enter the control number when prompted. Step 6: Complete verification with the agent. Step 7: Wait approximately 9 business days for processing to resume. The control number is ONLY on the physical letter they mailed you. It serves as a security measure to ensure only the intended recipient can complete verification.
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Butch Sledgehammer
•What happens if someone calls without the control number? Would they be able to verify their identity through alternative means, or is this number absolutely required for the process to move forward?
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Freya Ross
•I experienced this verification requirement during the 2023 filing season. The system architecture is designed specifically to require that control number as an authentication token. Without it, representatives cannot access the verification module in their internal systems.
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Leslie Parker
•I went through this exact process last year after getting audited for my education credits. Is it normal that it took almost 3 weeks after verification for my refund to actually process? Just trying to see if my experience was typical.
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Sergio Neal
This verification situation is similar to what happened to my brother last tax season. He spent 4 days trying to reach someone at the IRS to ask questions about his control number. Eventually used Claimyr (https://claimyr.com) and got through to an agent in about 15 minutes. Might be worth it if you're struggling to get through on the verification line. I'm slightly worried these verification holds are becoming more common this year compared to previous filing seasons.
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Savanna Franklin
Have you checked if the letter is actually legitimate? I'm concerned because there are so many IRS scams going around! A real IRS identity verification letter should have official letterhead, your truncated SSN, and specific instructions. I'd feel terrible if you called a scam number and gave your personal information. Maybe visit an IRS Taxpayer Assistance Center in person? They could confirm if you really need to verify your identity and might help you get a new control number if you lost the original letter.
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Juan Moreno
FYI - the verification process changed a bit this yr. They now offer online verification for some ppl thru ID.me. Depends on which letter # you got tho. If it's Letter 5071C, you can verify online. If it's 4883C, gotta call. If it's 5747C, gotta visit in person. Rly wish they'd make this stuff clearer! The control # format is usually 3 letters followed by 11 numbers. Btw, after verification, your refund usually comes within 9 wks, not the 6-8 wks they tell you.
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Amy Fleming
If you possibly misplaced the letter, you could try calling the general IRS customer service line at 800-829-1040. They might be able to help you, though the wait times are usually pretty long. I believe they can possibly verify that a letter was sent to you and maybe provide some guidance. It's sort of a last resort, but sometimes you can get a helpful agent who can at least point you in the right direction.
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Alice Pierce
Please be extremely careful with this process. My colleague thought he received a legitimate identity verification letter last tax season, but it was actually a sophisticated phishing attempt. The scammers had created a fake letter with a control number and directed him to call a number that wasn't official. He nearly provided his full SSN and banking details before realizing something was off. Always double-check the phone number against the official IRS website before calling, and never provide information if anything feels suspicious.
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Cass Green
I just went through this exact same situation in February! The 14-digit control number should definitely be on your physical letter - mine was in the upper right corner in a box labeled "Control Number." If you absolutely cannot find it on the letter, there might be a issue with how it was printed. In that case, you'll need to call the IRS at 800-829-1040 and explain that you received an identity verification letter but the control number is missing or illegible. They can verify that the letter was sent and potentially issue a new one. Just be prepared for long wait times. Also, make sure you're looking at the actual IRS letter and not just the envelope - sometimes people accidentally throw away the letter and only keep the envelope. The verification process itself was actually pretty straightforward once I had all the right information, so don't stress too much once you locate that number!
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Naila Gordon
I went through this same verification process just last month and understand your frustration! The 14-digit control number should definitely be on the physical letter they mailed you - typically in the upper right corner or sometimes in a separate box near your name and address. Double-check both sides of the letter carefully, as sometimes it can be in an unexpected location. If you've thoroughly searched the letter and still can't find it, there's a possibility it was printed incorrectly or the letter got damaged in transit. In that case, you'll need to call the IRS directly at 800-829-1040 to report that you received an identity verification letter but the control number is missing or illegible. They can verify the letter was sent to you and potentially issue a replacement. One thing to keep in mind - this control number is your unique authentication key for the verification process, so the IRS representatives won't be able to help you verify your identity without it. The good news is that once you have the number and complete the verification call, the process typically takes about 9 business days to resume processing your refund. Make sure to have your previous year's AGI and two forms of ID ready when you call!
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Andre Dupont
•Thanks for the detailed explanation! I'm actually in a similar situation right now - got my verification letter yesterday but I'm having trouble locating the control number. You mentioned it could be in the upper right corner or near the name/address - are there any other common locations where it might appear? I've checked both sides multiple times but wondering if I'm missing something obvious. Also, when you called the 800-829-1040 number, did they ask for any specific information to verify that you actually received the letter before they would help with a replacement?
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Christopher Morgan
I went through this exact verification process about 6 months ago and can confirm the control number is definitely on the physical letter they mailed you. In my case, it was printed in a gray box on the right side of the letter, but I've heard from others that the location can vary slightly. One tip that helped me - try looking under different lighting conditions or with a magnifying glass if you have one. Sometimes the printing can be faint or the number might blend in with other text on the page. Also, make sure you're looking at the actual letter content and not just the envelope or any accompanying documents. If you absolutely cannot locate it after a thorough search, you'll need to call the IRS and explain the situation. They can verify that an identity verification letter was sent to your address and potentially issue a replacement letter with a new control number. Just be prepared for potentially long wait times when calling. The verification process itself is actually pretty straightforward once you have that number - just make sure you have your previous year's AGI, two forms of ID, and details from your current tax return ready when you call. Good luck!
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Maya Lewis
•This is really helpful advice! I'm actually dealing with a similar verification letter right now and was getting frustrated trying to find that control number. The tip about checking under different lighting is great - I hadn't thought of that. Just curious, when you went through the verification call, did they ask you to confirm any specific details from the letter itself beyond just the control number? I want to make sure I have everything ready before I call so I don't have to go through the process multiple times.
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Miguel Harvey
I completely understand your frustration - I went through this exact same situation about 8 weeks ago! The 14-digit control number should definitely be printed somewhere on the physical letter they sent you. In my case, it was located in a small box in the upper portion of the letter, but I've seen others mention it can appear near your name/address section or even along the margins. Here's what I'd suggest: First, get good lighting and examine every inch of that letter - front and back. Sometimes the printing is lighter than the rest of the text. If you still can't find it after a thorough search, call the IRS at 800-829-1040 and explain that you received the identity verification letter but the control number appears to be missing or illegible. They can confirm the letter was sent and potentially issue a replacement. Just be aware that without that specific control number, you won't be able to complete the verification process - it's essentially your unique key to access their verification system. Once you do find it and complete the phone verification, expect about 9 business days for your refund processing to resume. Make sure to have your prior year AGI, two forms of ID, and your current return details ready when you call. The actual verification call is pretty straightforward once you have all the required information!
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Freya Collins
•This is such helpful advice! I'm actually going through this exact same process right now and was starting to panic about not being able to find my control number. Your tip about checking under good lighting is really smart - I was looking at it under my dim desk lamp and probably missing details. Just to clarify, when you called the IRS to report a missing control number, did they require you to provide any specific information from the letter to prove you actually received it? I'm wondering what details I should have ready before making that call, just in case my control number really is missing or illegible.
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Vanessa Chang
I went through this verification process just a few months ago and had the same panic when I couldn't immediately locate the control number! After reading through all these helpful responses, I want to add one more thing that might help - sometimes the control number can be printed in a slightly different shade or using a different font than the rest of the letter, which can make it blend in. In my case, I found it printed vertically along the right margin of the letter in small text. I had looked at that letter probably 10 times before I noticed it there! It was formatted as XXX-XXXXXXXXXXX (3 letters, dash, 11 numbers). Also, just to echo what others have said about verifying it's legitimate - make sure the phone number on your letter matches exactly with what's listed on the official IRS.gov website. I was paranoid about scams too, so I actually cross-referenced everything before calling. The verification call itself took about 20 minutes once I got through to an agent, and my refund was processed exactly 9 business days later just like they promised. Don't give up - that number is definitely somewhere on that letter!
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Chris Elmeda
•That's such a great point about the control number being printed vertically or in different formatting! I never would have thought to look along the margins. I'm actually dealing with this verification letter right now and was getting really stressed about finding that number. Your description of the XXX-XXXXXXXXXXX format is super helpful too - now I know exactly what I'm looking for. Did you have any trouble getting through to an agent when you called, or were the wait times manageable? I keep hearing horror stories about people waiting hours on hold with the IRS.
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Taylor To
I just went through this verification process last week and want to share a few additional tips that might help! First, if you have the letter in front of you, try taking a photo of it with your phone and zooming in - sometimes the camera picks up details that are hard to see with the naked eye, especially if the printing is faint. The control number format is typically 3 letters followed by 11 numbers (like ABC12345678901), and it's usually labeled clearly as "Control Number" or "Verification Control Number." I found mine in a shaded box near the top of the letter, but based on other comments here, the location can definitely vary. One thing I wish I had known earlier - if you need to call for a replacement letter, try calling right when they open at 7 AM local time. The wait times are much shorter in the morning. When I called at 7:05 AM, I got through in about 15 minutes versus the 2+ hour waits later in the day. Also, once you do complete the verification, you can check your transcript online after about a week to see if the hold codes have been removed. Look for the 570/971 codes to disappear - that's how you'll know they've released your refund for processing. The whole experience is stressful, but you'll get through it!
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Malik Thomas
•This is incredibly helpful advice! The tip about taking a photo and zooming in is brilliant - I never would have thought of that. I'm actually waiting for my verification letter to arrive (got the notice in my online account but the physical letter hasn't come yet), so knowing to look for that ABC12345678901 format will save me so much time when it does arrive. The 7 AM calling tip is also gold - I had no idea the wait times varied that much throughout the day. Quick question: when you checked your transcript for the 570/971 codes disappearing, did you use the IRS website or was there another way to access that information?
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Aidan Percy
I went through this exact same situation about 6 weeks ago and completely understand your frustration! The 14-digit control number should definitely be printed on the physical letter they mailed you. In my case, it was in a gray box on the upper right side of the letter, clearly labeled "Control Number." A few tips that helped me locate it: - Check under bright lighting or even use your phone's flashlight - Look at both sides of the letter carefully - The format is typically 3 letters followed by 11 numbers (like ABC12345678901) - Sometimes it can be printed vertically along the margins If you've thoroughly searched and still can't find it, the number might be printed too faintly or the letter could have been damaged. In that case, you'll need to call 800-829-1040 and explain that you received the verification letter but the control number is missing/illegible. They can verify the letter was sent and potentially issue a replacement. Just make sure the letter is legitimate by checking that any phone numbers match exactly with IRS.gov. Once you have the control number and complete verification, expect about 9 business days for processing to resume. Have your prior year AGI and two forms of ID ready when you call. Don't give up - that number is definitely there somewhere!
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Malik Jackson
•This is really comprehensive advice! I'm actually a newcomer to dealing with IRS verification processes, so reading through everyone's experiences here is both reassuring and educational. The tip about using your phone's flashlight to check for faint printing is something I wouldn't have thought of. I'm curious - for those who had to call for a replacement letter, approximately how long did it take to receive the new one in the mail? I'm trying to plan ahead in case I run into the same issue when my letter arrives. Also, is there any way to expedite the replacement letter process, or do you just have to wait for regular mail delivery?
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GalacticGuardian
I'm dealing with a similar verification letter situation right now and this thread has been incredibly helpful! As someone new to this process, I had no idea there were so many different places the control number could be located on the letter. The tips about checking under different lighting conditions and using a phone camera to zoom in are brilliant - I'll definitely try those when my letter arrives. One question for those who have been through this - I've seen mentions of different letter types (5071C, 4883C, 5747C) with different verification methods. How can you tell which type of letter you received? Is there a specific code or identifier on the letter itself that indicates which verification process you need to follow? I want to make sure I'm preparing for the right type of verification once I receive my letter. Also, for anyone who had to get a replacement letter due to a missing control number, did the IRS provide any sort of confirmation or tracking information so you'd know when to expect the new letter? I'm trying to plan my timeline since I know these processes can take a while. Thanks to everyone for sharing their experiences - it's making this whole situation feel much less overwhelming!
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CosmicCommander
•Welcome to the community and thanks for such a thoughtful question! As someone who went through this process recently, I can help clarify the letter types. The letter code is usually printed at the top or bottom of the letter - look for "Letter" followed by the number/letter combination. Letter 5071C allows online verification through ID.me, Letter 4883C requires the phone verification process we've been discussing (which needs that 14-digit control number), and Letter 5747C means you have to visit a Taxpayer Assistance Center in person. Unfortunately, when I had to get a replacement letter, the IRS didn't provide tracking info - they just said to expect it within 7-10 business days via regular mail. One tip: if you're worried about mail delivery issues, you might want to consider having important IRS correspondence sent to a more secure address if that's an option for you. The whole process can definitely feel overwhelming at first, but this community has been so helpful in breaking it down into manageable steps!
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Andre Laurent
As someone who just went through this verification process a few weeks ago, I can definitely relate to your frustration! The 14-digit control number should be printed somewhere on the physical letter - in my case, it was in a small rectangular box near the top right of the letter, but I've heard it can appear in different locations depending on when the letter was printed. Here are a few things that helped me locate mine: - Use bright lighting or even your phone's flashlight to check for faint printing - Look carefully at both sides of the entire letter - The format is typically 3 letters followed by 11 numbers (like ABC12345678901) - Check along the margins - sometimes it's printed vertically in smaller text If you've searched thoroughly and still can't find it, there's a chance it wasn't printed clearly or got damaged in transit. In that case, you'll need to call the IRS at 800-829-1040 and explain that you received the identity verification letter but the control number is missing or illegible. They can confirm the letter was sent to you and issue a replacement. Just make sure to verify the authenticity of your letter by cross-referencing any phone numbers with the official IRS.gov website before calling. Once you do complete the verification process, expect about 9 business days for your refund processing to resume. Have your previous year's AGI and two forms of ID ready when you make the call. Good luck - I know it's stressful, but you'll get through it!
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Oliver Schulz
I just went through this exact verification process about 3 weeks ago and completely understand your stress! The 14-digit control number is definitely printed on the physical letter they mailed you, but it can sometimes be tricky to spot. In my case, it was in a light gray box in the upper right corner labeled "Control Number" - the format was ABC12345678901 (3 letters, 11 numbers). Here's what worked for me when I was having trouble finding it: - Used my phone's flashlight to illuminate the entire letter under bright light - Checked both sides carefully, including all margins and corners - Took a photo with my phone and zoomed in to look for faint printing - Made sure I was looking at the actual letter content, not just accompanying documents If you've thoroughly searched and it's genuinely missing or illegible, call 800-829-1040 and explain the situation. They can verify that a verification letter was sent to your address and potentially issue a replacement, though expect 7-10 business days for a new letter to arrive. Before calling anyone, double-check that all phone numbers match exactly with what's listed on IRS.gov to avoid scams. Once you find that control number and complete verification, your refund should resume processing within 9 business days. Have your prior year AGI and two forms of ID ready when you call. Don't give up - that number is somewhere on that letter!
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Emma Davis
•This is such a comprehensive and reassuring response! As someone completely new to IRS verification processes, I really appreciate you sharing the specific details like the ABC12345678901 format and the exact location where you found yours. The tip about using a phone's flashlight and taking a photo to zoom in is incredibly practical - I never would have thought of that approach. I'm actually waiting for my verification letter to arrive (I can see the notice in my online account but the physical letter hasn't come yet), so knowing exactly what to look for and where to look will save me so much time and stress. Quick question - when you had to call the IRS to verify the letter was sent, did they ask for any specific information from your tax return or personal details to confirm your identity before they would help with a replacement letter?
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