UEI Validation Guide: How to Fix Common Unique Entity ID Errors
Complete guide to fixing UEI validation problems in SAM.gov. Learn how to resolve common Unique Entity ID errors, validation failures, and registration issues blocking your government contracting.
Quick Answer
UEI (Unique Entity Identifier) validation errors occur when your business information in SAM.gov does not match IRS or state records. The most common fixes are: ensuring your legal business name exactly matches IRS records, verifying your TIN/EIN, and confirming your physical address matches state registration. Most validation issues resolve within 5-10 business days after submitting correct information.
What is UEI?
The Unique Entity Identifier (UEI) is a 12-character alphanumeric ID assigned to entities registered in SAM.gov. It replaced the DUNS number in April 2022 as the official identifier for federal contractors and grant recipients. Unlike DUNS, UEI is free and assigned automatically by SAM.gov during registration.
Before your UEI is activated, SAM.gov validates your entity information against IRS records and other authoritative sources. Validation failures prevent registration completion and block your ability to bid on government contracts.
UEI vs DUNS Comparison
- UEI is free - No cost to obtain or maintain, unlike DUNS
- Auto-assigned - SAM.gov assigns UEI automatically during registration
- Government-managed - GSA manages UEI, not a private company
- Direct IRS validation - Validated against IRS records automatically
Common UEI Errors
UEI validation errors fall into several categories. Understanding which error you're facing helps determine the correct solution.
TIN Validation Failed
Your Tax Identification Number (EIN or SSN) could not be verified against IRS records.
Cause: Typo in TIN, recently issued TIN not yet in IRS database, or business name mismatch with IRS records.
Legal Business Name Mismatch
The legal name entered does not match IRS or state registration records.
Cause: Using DBA instead of legal name, punctuation differences, abbreviation variations (Inc. vs Incorporated).
Address Validation Error
Physical or mailing address cannot be verified by USPS or does not match records.
Cause: P.O. Box used as physical address, address format issues, recent address change not updated with IRS.
Entity Already Registered
The TIN is already associated with another SAM.gov registration.
Cause: Duplicate registration attempt, predecessor company registration still active, or registration by unauthorized person.
Validation Failure Solutions
General Troubleshooting Steps
- 1Obtain a copy of your IRS CP 575 (EIN confirmation letter) or SS-4 form
- 2Compare the exact legal name, TIN, and address on IRS documents with your SAM.gov entry
- 3Update SAM.gov to match IRS records exactly (including punctuation and spacing)
- 4Resubmit for validation and allow 5-10 business days for processing
- 5If still failing, contact the Federal Service Desk for manual validation assistance
Do Not Create Multiple Registrations
If validation fails, do not start a new registration. This creates duplicate entries that are harder to resolve. Work within your existing registration to correct issues.
IRS/TIN Mismatch Issues
TIN validation failures are the most common UEI issue. The IRS database is the authoritative source, so your SAM.gov information must match exactly.
Get IRS Verification
Request a CP 575 letter or use IRS online services to confirm your EIN and legal name on file.
- • Call IRS Business line: 800-829-4933
- • Request EIN verification letter
- • Check IRS.gov EIN online tools
- • Review Form SS-4 you submitted
Update IRS Records
If your business name has changed, update IRS records before retrying SAM.gov validation.
- • File Form 8822-B for address change
- • File appropriate form for name change
- • Allow 4-6 weeks for IRS processing
- • Then retry SAM.gov validation
Recently Issued EIN
If your EIN was issued within the last 2 weeks, it may not yet be in the IRS validation database that SAM.gov uses. Wait 2-3 weeks after receiving your EIN before attempting SAM.gov registration. The IRS database typically updates weekly.
Legal Name Problems
Your legal business name in SAM.gov must exactly match your IRS records. Common issues include DBA names, formatting differences, and entity type suffixes.
Legal Name vs DBA
SAM.gov requires your legal entity name—not your "Doing Business As" (DBA) or trade name. Your DBA can be added separately but should not replace your legal name.
Wrong (DBA)
Joe's IT Solutions
Correct (Legal)
Joseph Smith Technology Services LLC
Common Name Format Issues
- Abbreviations: Use exactly what IRS has—"Inc." vs "Incorporated" vs "Inc"
- Punctuation: Include or exclude commas, periods exactly as IRS shows
- Spacing: "ABC Corp" is different from "ABC Corp" (double space)
- Ampersands: "Smith & Associates" vs "Smith and Associates"
- Entity suffix: LLC, L.L.C., Limited Liability Company—use IRS version
Address Validation Errors
Physical Address Requirements
SAM.gov requires a physical address—not a P.O. Box—that matches USPS verification.
- • Must be a street address
- • Cannot be P.O. Box for physical location
- • Must be USPS deliverable
- • Virtual offices may not validate
Address Format Tips
Use USPS standardized format for best validation results.
- • Use USPS.com address lookup tool
- • Include suite/unit numbers correctly
- • Use standard abbreviations (St, Ave, Blvd)
- • Match ZIP+4 code exactly
Address Change Process
If you've moved, update addresses in this order to ensure validation:
- 1Update IRS with Form 8822-B (allow 4-6 weeks)
- 2Update state business registration/Secretary of State
- 3Verify USPS recognizes the new address
- 4Update SAM.gov after IRS change processes
Resolution Timeline
Expected Timeframes
Getting Help
If self-service troubleshooting does not resolve your UEI validation issue:
- Federal Service Desk: 866-606-8220 (M-F 8am-8pm ET)
- Submit incident: fsd.gov portal for written requests
- Live chat: Available on SAM.gov during business hours
- Have ready: UEI (if assigned), legal name, TIN, specific error message
Frequently Asked Questions
What happened to my DUNS number?
DUNS numbers are no longer used for federal contracting. If you had an active SAM.gov registration with a DUNS, you were automatically assigned a UEI in April 2022. Your UEI is visible in your SAM.gov entity record. Do not try to obtain or use a DUNS for new registrations.
Can I use an ITIN for SAM.gov registration?
No, Individual Taxpayer Identification Numbers (ITINs) are not accepted for SAM.gov entity registration. You must have either an Employer Identification Number (EIN) for business entities or a Social Security Number (SSN) for sole proprietors who are U.S. citizens or permanent residents.
Why does validation keep failing even with correct information?
If you've verified your information matches IRS records exactly and validation still fails, there may be a database synchronization issue. Contact the Federal Service Desk to request manual validation. They can verify your documents directly and push through registration when automated validation fails due to system issues.
Can I register while waiting for validation to complete?
You can begin your SAM.gov registration and save progress, but your registration will not be complete or active until validation passes. You cannot bid on contracts or receive awards until your entity status shows "Active" in SAM.gov.
Do I need to renew my UEI?
Your UEI itself does not expire, but your SAM.gov registration must be renewed annually. During renewal, validation is performed again, so ensure your IRS information remains current. Set reminders to renew 30-60 days before expiration to avoid lapses.
Start Finding Government Contracts with BidFinds
Once your UEI validation is complete, BidFinds helps you discover federal, state, and local contract opportunities matched to your capabilities—all for just $99/month.
Ready to Find Your Next Contract?
Get instant access to thousands of government construction bids with our AI-powered platform.
Get Started