A rejected SAM.gov registration is not usually SAM.gov being broken. It is almost always a mismatch: your paperwork says one thing, and a government database says another, and the system will not clear you until they agree. Here are the five mismatches that cause most of it, and what actually fixes each one.
1. Your legal name does not match IRS records, letter for letter
This is the single biggest cause. Entity validation checks your legal business name and EIN against IRS records, and it wants an exact match, including punctuation. "Acme Solutions, LLC" and "Acme Solutions LLC" are not the same string to this system, even though they are the same company to you.
The fix: pull your IRS Letter 147C or your original CP 575 notice and copy the legal name from it character for character, including the comma. Do not use your DBA, your marketing name, or a version you think reads better.
2. Your physical address does not match an authoritative source
SAM.gov checks your address against outside records: Secretary of State filings, utility records, postal databases. A suite number typo, a PO box where a physical address is required, or an address that changed after you filed with your state will all trip this.
The fix: use the exact address on file with your Secretary of State. If you moved, update that filing first. If the mismatch persists, SAM.gov's entity validation guidance directs you to open an incident with the Federal Service Desk rather than resubmitting blind.
3. Your EIN or entity type does not line up
Sometimes the EIN is entered correctly but the entity type selected in SAM.gov does not match how that EIN is filed with the IRS. A sole proprietor EIN registered as a corporation, or a recently changed entity structure that has not caught up with the IRS yet, will both fail here.
The fix: confirm your current entity type with the IRS before you touch the SAM.gov form. If you changed structure this year, expect the IRS side to lag, and register only once that side is settled.
4. You get pulled into manual review and the notarized letter does not match
When automatic matching fails, SAM.gov asks for supporting documents, often a notarized letter identifying your entity administrator. Reviewers compare that letter against your SAM.gov data with no tolerance for discrepancies. A different address, a slightly different name, a missing physical address on the letter itself: any of it sends the letter back.
The fix: type your legal business name and physical address on the letter exactly as they appear in your SAM.gov submission, not from memory. Confirm the notarization requirements at SAM.gov's entity validation page before you mail anything, since a rejected letter means starting the mail cycle over.
5. Identity verification fails at Login.gov, not SAM.gov
SAM.gov uses Login.gov to verify the actual person registering, not just the business. That step asks for a state ID, a selfie match, and multi-factor setup. When this fails, it feels like a SAM.gov problem, but it is a separate system.
The fix: if verification fails, resolve it at Login.gov directly, not through the Federal Service Desk. Trying to fix an identity-verification issue through SAM.gov support will just bounce you back.
We are not SAM.gov, are not affiliated with the U.S. government, and are not a registrar. SAM.gov registration is always free at sam.gov. We provide preparation assistance only.
The pattern underneath all five
Every one of these is the same root problem: two records that describe your business differently. None of it is fixed by resubmitting the same form again and hoping. It is fixed by finding the one field that disagrees and correcting it at the source, IRS, Secretary of State, or Login.gov, before you touch SAM.gov again.
If you want a structured way to check your information against these exact failure points before you submit, our free readiness check walks through them one at a time.
None of these five failures have anything to do with a paid service getting you registered faster. Here's the fuller version of that argument, why the delay is almost always a data mismatch, never a missing payment.