You're reviewing a stack of completed Form 4473s when you spot it — a wrong date, a blank field, a buyer's initials where a full signature was required. Now what?
How you handle that discovery matters almost as much as the error itself. A mistake corrected the right way is a corrected mistake. A mistake corrected the wrong way — or corrected with white-out, or ignored entirely — can turn a minor paperwork issue into a documented violation the next time an ATF inspector pulls your files.
Here's what you need to know about correcting Form 4473 errors, what ATF allows, what it doesn't, and which situations require you to stop and make a phone call instead of reaching for a pen.
What's Covered in This Article
- The one correction method ATF accepts
- What you can never do to a completed 4473
- Which errors can be corrected after the fact — and which can't
- When the transferee needs to be involved in the correction
- When to call your ATF IOI instead of correcting it yourself
- How to avoid corrections entirely
The One Correction Method ATF Accepts
ATF's guidance on correcting Form 4473 errors is specific and consistent: there is one acceptable method for making a correction on a completed form, and it applies regardless of who made the error or when it was discovered.
Draw a Single Line Through the Error
Use a single horizontal line through the incorrect entry — enough to make clear it is being corrected, but not so heavy that the original entry is illegible. The original information must remain readable. This matters: ATF needs to see what was there before the correction.
Write the Correct Information Nearby
Write the correct entry clearly next to or above the crossed-out text. If space is tight, write it as close to the original field as possible. The correction should be unambiguous — a reader should be able to tell immediately what replaced what.
Initial and Date the Correction
The person who made the original error should initial and date the correction. This is the step most dealers skip — and it's the step ATF specifically looks for. A correction without initials and a date is an unexplained alteration, which raises more questions than it answers.
That's the complete procedure. No special forms, no written explanation required in most cases — just a lined-out error, correct information, initials, and date.
What You Can Never Do to a Completed 4473
White-Out, Correction Tape, and Erasure
Using white-out, correction fluid, correction tape, or any other method of concealing the original entry is never acceptable on a Form 4473. These materials destroy the audit trail that ATF requires. A 4473 with white-out on it is not a corrected form — it's a compromised record, and ATF treats it that way.
This is a bright line. There is no context in which white-out is appropriate on a completed 4473. If you find a form in your files with white-out on it, consult your ATF IOI directly about how to handle it.
Rewriting the Form From Scratch
Creating a new, clean copy of a Form 4473 to replace one with errors is not an acceptable correction method. The original form — errors and all — is the legal record of the transaction. A rewritten form raises serious questions about what was changed and why. If an error is significant enough that you're considering rewriting the form, that's a situation that calls for your IOI, not a fresh sheet of paper.
Which Errors Can Be Corrected After the Fact
Not every error on a 4473 can simply be lined out and initialed. The type of error — and who needs to make the correction — determines what's possible.
Dealer Errors (Section B, Section D, Section E)
Errors in sections completed by the dealer or dealer's employee — including wrong dates, transposed numbers in a serial number or NTN, missing transferor initials in Section D, or an incorrect entry in Section E — can generally be corrected by the employee who made the error using the line-through method. The correction should be made as soon as the error is discovered.
Buyer Errors Discovered Before the Transfer
If you catch an error in the buyer's section before the firearm is transferred, the process is straightforward: hand the form back to the buyer, have them draw a single line through the error, write the correct information, and initial and date it. Do not make changes to the buyer's section yourself.
Buyer Errors Discovered After the Transfer
This is where it gets complicated. If the buyer has already left and you discover an error in their section, you cannot correct it yourself — the buyer's certifications and answers belong to them. Depending on the nature of the error, you may need to contact the buyer to return and make the correction in person, or you may need to consult your IOI about the appropriate path forward. Do not alter the buyer's section under any circumstances.
Errors That Cannot Be Corrected After the Fact
Some errors on a completed 4473 are not fixable retroactively — not because the paperwork can't be changed, but because the legal requirement attached to the error cannot be undone after the transfer.
Missing Buyer Signature at Question 21
The buyer's certification signature at the bottom of Section A is a legal attestation made before the transfer occurs. If that signature is missing from a completed transfer, adding it after the fact doesn't satisfy the original requirement — the buyer was supposed to certify before the firearm changed hands. This type of error should be reported to your IOI, who can advise how it will be treated and whether any additional documentation is appropriate.
NICS Check Not Conducted
If a firearm was transferred without a NICS check being run at all — no NTN, no record of a check — that is not a paperwork error. It is a substantive compliance failure, and it cannot be corrected by writing something on the form after the fact. Consult a firearms attorney and contact your IOI.
Eligibility Questions Left Blank
If a disqualifying question in Section A was left blank at the time of transfer, the transfer should not have proceeded. Going back and writing "No" after the firearm is already gone doesn't change what happened. How ATF treats this finding depends on the circumstances — but it is not something to quietly pencil in and hope it goes unnoticed.
When to Call Your ATF IOI Instead of Correcting It Yourself
Most routine errors — wrong date, transposed digit, missed initial — can be handled with the standard line-through correction. But there are situations where you should pick up the phone and call your local ATF field office before doing anything to the form.
Call your IOI if: the error involves a missing buyer signature; the NICS check was not completed or documented; you discover a pattern of the same error across multiple forms; the form has already been altered improperly (white-out, rewrite); or you are genuinely unsure whether a correction is appropriate. ATF IOIs field these calls regularly and will generally walk you through the correct procedure. Getting guidance before making a mistake on top of a mistake is always the right call.
The Better Strategy: Don't Have Errors to Correct
The line-through correction process exists for honest mistakes — and every store makes them eventually. But the dealers who fare best during ATF inspections are the ones who catch errors before the form is filed, not weeks or years later. 4473 Pro audits every form the way an IOI would — checking every field, every section — so you can fix problems on the spot, when it's still easy.
Start Auditing for $24/month →Why Proper Corrections Actually Help You
There's a natural instinct to want your forms to look perfect — no cross-outs, no corrections, nothing that draws attention. That instinct is understandable, but it leads to bad outcomes. A properly executed correction — lined out, initialed, dated — tells an inspector that you found an error and handled it correctly. It demonstrates that your compliance process works.
An improperly altered form, or a form where an error has been obscured, does the opposite. It raises questions about what else might have been changed, what the original said, and whether the alteration was intentional. A correction done right is evidence of a functioning compliance program. An attempted cover-up is evidence of the opposite.
Quick Reference: Correction Rules at a Glance
✓ Acceptable
Single line through error · Correct information written nearby · Initials and date from the person who made the error · Buyer corrects buyer's section · Dealer corrects dealer's section
✗ Never Acceptable
White-out or correction tape · Erasure · Rewriting the form · Dealer altering buyer's section · Adding a signature or date after the fact to satisfy a requirement that existed at the time of transfer
This article is intended as general compliance information for FFL dealers. It does not constitute legal advice. Correction procedures and ATF guidance are subject to change — always consult your ATF Industry Operations Inspector or a qualified firearms attorney for guidance specific to your situation.