Record an IRS CP2100 or CP2100A listing against a customer (the accounts service forwarding its record, a service with customers:write, or customer servicing staff with a step-up within five minutes; idempotency key). Backup withholding turns on by withholding_due unless the customer cures the mismatch first: a certified W-9 cures a first B notice, a second needs the TIN validated by Form SSA-7028 or IRS Letter 147C
POST
/customers/{id}/tin-noticesPath parameters
idstringRequiredHeaders
Idempotency-KeystringOptionalSend on every write that creates or changes money or state; a replay with the same key returns the original result with 200.
Returns
200 OK
Errors
Every error is a problem document with a stable code. See Errors.
400401403404409412413422424429500503