Can You Reuse the Same Fingerprints for Multiple NFA Applications?
Short answer: Yes. One EFT file works for unlimited Form 1, Form 4, and Form 5 applications—forever.
The Short Answer
Yes, you can reuse your fingerprints for unlimited NFA applications.
Once you have a valid EFT fingerprint file, you can use it for:
- Multiple suppressors
- Multiple SBRs (Short Barreled Rifles)
- Multiple SBSs (Short Barreled Shotguns)
- Machine guns (if transferable)
- AOWs (Any Other Weapons)
- Destructive devices
- Any combination of the above
There is no limit on how many times you can use the same fingerprint file, and it does not expire.
How Fingerprint Reuse Works
Your fingerprints are biometric identifiers—they do not change over time (except in cases of severe injury). When the ATF receives your fingerprints with an NFA application, they use them to verify your identity and run background checks.
Each Application = Same File
When you submit a Form 1 or Form 4 through eForms, you upload your EFT fingerprint file. That same file can be uploaded to every subsequent application:
- Form 4 for Suppressor #1 → Upload fingerprints.eft
- Form 4 for Suppressor #2 → Upload same fingerprints.eft
- Form 1 for SBR → Upload same fingerprints.eft
- Form 4 for Suppressor #3 → Upload same fingerprints.eft
- ...and so on, indefinitely
Why This Works
The ATF is verifying that the person submitting the application matches the fingerprints on file. As long as you are the same person (which you are), the same fingerprints will match every time.
No Expiration Date
Unlike some other fingerprint requirements, ATF fingerprints do not expire.
Comparison with Other Systems
| System | Fingerprint Validity |
|---|---|
| ATF NFA (Form 1, 4, 5) | No expiration |
| FBI Employment Background Check | Often 6-12 months |
| TSA PreCheck | 5 years (re-enrollment required) |
| State CCW Permits | Varies by state (often 2-5 years) |
Use the Same File for Years
Many NFA enthusiasts create one EFT file and use it for all their purchases over many years. A file created in 2020 works just as well for a 2026 application as a brand new file would.
Works Across All Form Types
Your EFT file is not specific to any particular ATF form. The same fingerprints work for:
Form 1 (Application to Make and Register a Firearm)
Used when manufacturing your own NFA item (SBR, SBS, suppressor, AOW). Same fingerprint file as any other NFA form.
Form 4 (Application for Tax Paid Transfer)
Used when purchasing an NFA item from a dealer. Same fingerprint file as any other NFA form.
Form 5 (Application for Tax Exempt Transfer)
Used for inheritance or government transfers. Same fingerprint file as any other NFA form.
Mix and Match
You can freely use the same EFT file across different form types:
- Buy a suppressor (Form 4) with fingerprints.eft
- Build an SBR (Form 1) with the same fingerprints.eft
- Inherit a machine gun (Form 5) with the same fingerprints.eft
Gun Trusts and Multiple Responsible Persons
If you use a gun trust for NFA purchases, the fingerprint rules apply individually to each responsible person.
Each Person Needs Their Own Fingerprints
Every responsible person listed on the trust must submit their own fingerprints with each application. You cannot share fingerprints between trust members.
Each Person Can Reuse Their Own
However, each person can reuse their own fingerprints for unlimited applications:
- Person A: Uses personA.eft for all applications where they are a responsible person
- Person B: Uses personB.eft for all applications where they are a responsible person
- Person C: Uses personC.eft for all applications where they are a responsible person
Cost Savings for Trusts
This is a significant advantage. A trust with 4 responsible persons only needs to pay for fingerprints once per person, regardless of how many NFA items the trust acquires.
When You DO Need New Fingerprints
While fingerprints can be reused indefinitely, there are a few situations where you might need new ones:
Physical Changes to Your Fingerprints
- Severe injury that altered ridge patterns
- Burns affecting fingertips
- Surgical procedures on hands
- Significant scarring
If your fingerprints have physically changed, you will need new prints because the old ones will not match anymore.
Lost Your EFT File
If you cannot find your EFT file and do not have a backup, you will need new fingerprints to create a new file.
ATF Specifically Requests Them
In rare cases, ATF might request updated fingerprints. This is uncommon but possible, especially if there are issues with your file.
Legal Name Change
If your legal name has changed, you do not necessarily need new fingerprints—the prints themselves are still valid. However, you may need to update the metadata in your EFT file to reflect your new name. SlapEFT can help with this.
How to Keep Your EFT File Safe
Since your EFT file can be reused indefinitely, it is worth taking care of:
Backup Strategies
- Cloud storage: Google Drive, Dropbox, iCloud—any secure cloud service
- Email to yourself: Send the file to your own email for easy retrieval
- USB drive: Keep a copy on a dedicated backup drive
- Multiple locations: Store copies in 2-3 different places
File Naming
Use a clear filename so you can find it later:
- John_Smith_Fingerprints_2026.eft
- NFA_Fingerprints_JSmith.eft
- ATF_EFT_JohnSmith.eft
Note the Creation Date
While the file does not expire, knowing when it was created can help if you ever need to verify it or create a new one.
Frequently Asked Questions
Is there a limit on how many times I can use my fingerprints?
No. There is no limit. You can use the same EFT file for 1 application or 100 applications.
Do I need new fingerprints for each suppressor I buy?
No. Use the same EFT file for every suppressor purchase. One and done.
Can I use fingerprints from 5 years ago?
Yes. ATF fingerprints do not expire. If your fingerprints have not physically changed, files from years ago are perfectly valid.
I used Silencer Shop for my first suppressor. Can I use those fingerprints for a Form 1 SBR?
Yes. Log into your Silencer Shop account and download your EFT file. It works for any NFA application, including Form 1 SBRs.
My trust has 3 members. Do we all use the same fingerprints?
No. Each person must have their own fingerprints. But each person only needs one set—they can reuse their own file for all applications where they are listed as a responsible person.
What if I change addresses?
Address changes do not require new fingerprints. The EFT file metadata can be updated, or you can simply use the old file and ensure your eForms application has the correct current address.
Can I use my fingerprints for both individual and trust applications?
Yes. Your fingerprints are yours regardless of how you file. Use the same EFT file whether you are applying as an individual or as a responsible person on a trust.
What format should I keep my file in?
Keep it as an .eft file—that is what ATF eForms accepts. Do not rename or convert it to other formats.
Conclusion
The bottom line: get your fingerprints once, use them forever.
Your EFT fingerprint file works for:
- ✓ Unlimited Form 1 applications
- ✓ Unlimited Form 4 applications
- ✓ Unlimited Form 5 applications
- ✓ Any combination of NFA items
- ✓ Years into the future
If you do not have an EFT file yet, get one from SlapEFT for $10. Then save it somewhere safe and use it for all your NFA adventures.
If you have existing fingerprints from another source (FBI background check, CCW permit, etc.), you may be able to convert them to ATF format instead of getting new ones.