SAM.gov, decoded from official sources

Registration, entity validation errors, scam calls, identifiers — cited to GSA and the Federal Service Desk

SAM.gov registration, step by step

The current SAM.gov entity registration process for federal contractors: Login.gov account, Unique Entity ID and entity validation, IRS TIN match, CAGE assignment, reps and certs —

The entity validation error decoder

Why SAM.gov entity validation fails and what the Federal Service Desk's own knowledge base says to do: stuck tickets, name/address mismatches, IRS TIN name-control failures, and th

The SAM registration scam calls, explained

Registered in SAM.gov and immediately got calls and emails offering paid "registration help"? Registration is 100% free. How the mills find you, what GSA officially warns about, an

UEI, CAGE, DUNS, TIN, MPIN — which identifier is which

The federal contractor identifiers untangled: what the UEI, CAGE code, retired DUNS, TIN, MPIN, and NCAGE each are, who issues them, their formats, and when you need each — cited t