Complete Guide: Filing an ATF eForm 4 (Individual to Trust)

Step 1 – Create an ATF eForms Account

1. Go to https://eforms.atf.gov
2. Click Register
3. Enter your personal information
4. Create password and 4-digit PIN

Does the trust need its own eForms account? No. eForms accounts belong to people, not entities — you register as yourself and act for a trust through your own login. In this scenario you are the transferor as an individual and, as a trustee, also a responsible person of the receiving trust, so a single account covers both sides and you use the same user ID and PIN at certification. Where it does matter is when someone other than you certifies for the trust: that person needs their own eForms account with their own user ID and 4-digit PIN. Registering takes a few minutes, but sort it out before the day you file rather than during it. Responsible persons who are not certifying still need a Form 5320.23, photo and fingerprints — but not an account.

Step 2 – Confirm Registration

• Firearm must already be approved on Form 1 or Form 4
• Have original approved form ready

Step 3 – Gather Documents

• Complete trust PDF (including amendments)
• Passport photos
• Form 23 for each responsible person
• Fingerprints (EFT preferred)

Step 3A – EFT Fingerprints

• Obtain .EFT file from fingerprint provider
• Ensure name matches application exactly
• One file per responsible person

Before you start: pull the item once, then fill out the Form 23s

The order matters here, and getting it backwards is the most common way to end up re-signing paperwork. The registry — not the roll marks on your can, not the invoice, not your own spreadsheet — is what eForms puts on the application, and the firearm block on each responsible person’s Form 5320.23 has to agree with it.

So do a test pull first. Start a Form 4, click through to the Firearm step, pull the item in by control number and serial exactly as described below, and write down what comes back: type, manufacturer, model, caliber, barrel length and overall length, character for character. You can save that draft and come back to it, and nothing is visible to anyone until you submit. Then fill out the 23s from what you wrote down.

Fill them from the markings instead and you can end up holding signed, dated documents that contradict the application they are attached to — and the fix is going back to every signer. This is not a rare edge case; registered descriptions and physical markings disagree routinely, for the ordinary reasons covered further down.

Two more things about the 23s, both of which cause denials:

• Fill every field, Section 2 included, on every responsible person’s form, and check that each is signed and dated. A single blank is enough to get the whole application kicked back, and eForms rejects rather than letting you correct it after the fact.
• Name each scanned file with its serial number — 5320.23 - [SERIAL] SIGNED.pdf — and keep exactly one folder of signed 23s. The 23 identifies a specific firearm, so a separate set is needed for each Form 4 you file. If a corrected batch gets produced later, retire the old folder immediately; two folders of similar-looking scans is how the wrong version gets attached.

Step 4 – Start Form 4

• Login to eForms
• Select ATF Form 4
• Begin new application

Form 4 Completion Checklist (Follow While Filing)

Page 1 – Transferor (You)

•  Select: Individual
•  Enter full legal name exactly as approved form
•  Enter current address
•  Enter county and state
•  Enter email and phone

Page 2 – Transferor Details

•  Verify name and address
•  Enter SSN (recommended)
•  Confirm citizenship
•  Answer storage location question

Page 3 – Transferee (Trust)

•  Select: Trust or Legal Entity
•  Enter exact trust name
•  Enter trust address
•  Enter county and state
•  Verify spelling matches trust document

Page 4 – Responsible Persons

•  Add ALL trustees
•  Enter full legal names
•  Enter addresses
•  Upload passport photo for each
•  Upload Form 23 for each
•  Upload EFT fingerprint file (if available)

Two things worth knowing on the responsible-person step. When each .EFT uploads, eForms parses it and returns the name, date of birth, and a validation status — anything other than Valid EBTS Package means stop and have the file redone. It is a free check that catches a bad fingerprint file now instead of weeks from now. And fill each responsible person’s record completely on the first pass, uploads included: reopening a saved record has been seen to garble the display, showing the photo’s filename against the fingerprint field and blanking a previously-set dropdown.

Page 5 – Firearm Information (pull it in by control number — don’t retype it)

This is the step people get wrong, because a Form 4 works differently than a Form 1. On a Form 1 you describe a firearm you’re making. On a Form 4 the firearm is already registered, so eForms pulls the description straight out of the registry — you don’t type it, and you can’t edit it. Have your item’s original control number handy (it’s printed on the approved Form 1, Form 3, or Form 4 stamp that put the item on the registry).

Two things about that control number that catch people out. First, the inventory picker only shows items visible inside eForms, so anything registered on paper years ago will not appear there at all — for older items the control number is the only way in, and there is no search-by-serial fallback. Second, on older approvals the physical tax stamp is frequently affixed right over the control-number block, leaving the number underneath unreadable. In one recent fifteen-item batch, twelve of the fifteen stamps were unreadable for exactly that reason: the paperwork was complete and in perfect order, and the numbers still had to be requested from ATF. If your items predate electronic filing, plan on making that request rather than hoping you won’t have to.

On the Firearm screen:

• Click “Add Firearm from Control Number.”
• Enter the item’s original control number and click Find Form.
• Enter the serial number exactly as it appears on the item and click Add Firearm.
• eForms fills in the manufacturer, product type, model, caliber, barrel length, and overall length from the National Firearms Registration and Transfer Record. Those fields are locked — the item comes in exactly as it was registered.

Then just verify the row against your approved stamp before moving on.

Page 6 – Electronic Documents (and the one attachment eForms won’t let you skip)

Two things trip people up here. First, the responsible-person items — each trustee’s Form 5320.23, 2×2 photo, and fingerprint (.EFT) file — are attached inside each person’s record back on the Responsible Persons step, not here. Second, this Electronic Documents step is where the trust paperwork goes, and every attachment needs a Document Type set from the dropdown plus a short description. The form won’t just take a bare file.

eForms will hold a hard error — “Must attach documentation of the existence of the legal entity” — until you attach your trust and tag it correctly:

• Attach your complete signed and notarized trust (with all schedules and amendments, one PDF is best), set Document Type = CORPORATION/TRUST/OTHER LEGAL ENTITY, add a short description, and click Add Document. This is the attachment that clears the error.
• Anything else you’re including goes in under Document Type = OTHER (with a description), the same way — choose file, set the type, add a description, click Add Document.

If you skip the document type, the form looks “uploaded” but still won’t submit — that’s almost always why a finished-looking Form 4 refuses to go through.

Let each upload finish before you click Add Document. Click it while a large file is still uploading and the click is accepted and quietly does nothing — no error, no warning, no row. Upload, wait a few seconds, set the document type and description, then add, and then read the record count in the grid to confirm it matches what you attached. Give the grid a full ten seconds to populate before you believe it; read it too early and it will report zero records when your documents are in fact there.

Page 7 – CLEO

•  Enter CLEO name
•  Enter agency
•  Enter address
•  Confirm location matches your jurisdiction

Page 8 – Review

•  Verify trust name
•  Verify serial number
•  Verify responsible persons
•  Verify firearm details

Page 9 – Certification

•  Enter eForms User ID
•  Enter 4-digit PIN
•  Click Certify & Submit
•  Confirm $0 tax (no payment required)

Who signs, and why you may be prompted twice

A Form 4 carries two signature blocks, and they are filled by capacity, not by person: item 9 is the transferor’s signature, and a separate block at the end is the transferee’s. The form’s own instructions (2.i) set who signs each — if the transferee is a trust or legal entity, a responsible person of that trust signs for it. Nothing in that requires the two signatures to come from two different people.

If you are both parties — you own the item personally and you are a trustee of the receiving trust — you sign in both capacities, and eForms authenticates you twice in a row. The two prompts are not identical: one capacity asks for your PIN alone, the other asks for your user ID and your PIN. Two prompts is the system working correctly, not a glitch, and the order they appear in can vary. Have both to hand before you click Certify & Submit.

If someone else certifies for the trust — a co-trustee acting as its responsible person — both parties certify inside this one session, on your account. Nobody logs out and swaps. At the certification prompt that person enters their own eForms user ID, not their email address, and their own 4-digit PIN. Tell them to bring the user ID in those words, because nearly everyone assumes it is their email address. Make sure they are not signed into eForms anywhere else either: there is one active session per account, and a second login will eject the first mid-filing.

One caveat worth stating plainly. Whether a particular person may act on both sides of a transfer, and whether your trust actually authorizes them to, is a legal question about your documents and your circumstances — not something a walkthrough can answer. What is described here is how the eForms system behaves; it is not legal advice. If there is any doubt about who is a responsible person under your trust, or who is entitled to sign for it, ask the attorney who drafted it before you file.

Page 10 – Confirmation

•  Save submission control number
•  Save confirmation email
•  Print cover sheet if mailing fingerprints

Step 6 – Fingerprints (If Not Using EFT)

• Mail fingerprint cards within 10 business days

Step 7 – CLEO Notification

No approval required

Step 8 – Wait for Approval

• Background check
• Trust review

Step 9 – Approval

• Approved Form 4
• Digital tax stamp

One thing to understand before you submit: a denial is final for that application. eForms will not let you amend a disapproved form, patch the field that was wrong, or have it reconsidered under the same number — that control number is finished. Going again means a brand-new application under a new number, the whole build redone, and the processing clock restarted at day one. It is also why you should never refile on a guess: find out specifically what was wrong first. That makes the Page 8 review the last point at which a mistake is free.

Common Mistakes

• Retyping the firearm instead of pulling it by control number. On a Form 4 the description comes from the registry and is locked — use “Add Firearm from Control Number.”
• An incomplete Form 5320.23 — especially Section 2. A single blank field on a responsible person’s questionnaire is enough to get an application kicked back, and eForms rejects rather than letting you fix it. Fill every field on every RP’s 23.
• Forgetting to set the Document Type on the trust. No entity-existence document tagged CORPORATION/TRUST/OTHER LEGAL ENTITY = the form won’t submit.
• Incorrect trust name (must match the trust document exactly).
• Missing trustees / responsible persons.
• Incorrect serial number.
• Missing fingerprints or photo for a responsible person.

Pro Tips

• Use EFT fingerprints
• Combine trust into one PDF
• Double-check everything before submitting
• Keep a schedule of control numbers in your trust. Every NFA item’s approved stamp has a control number — write them down in the trust (item, maker, model, serial, control number, approval date) and keep copies of the stamps with your trust records. It makes every future Form 4 a 30-second lookup instead of a scramble, and it’s what lets your successor trustee move these items cleanly if something happens to you.

Related guides

• NFA Transfer Services — we prepare and file these with you for a fixed fee
• How to File an ATF Form 1 to Make an SBR via eForms
• Transferring NFA Items From a Gun Trust After a Death
• Preparing for Your First Silencer or SBR Purchase