USDOT PIN, FMCSA Login & Account Recovery

The USDOT PIN is mailed to the registered business address when the USDOT is first issued. It is a 5-digit credential paired with the USDOT number. Once lost, it has to be re-mailed by the FMCSA — there is no email or phone reset path. The mailed PIN typically arrives in 7-14 business days.

For carriers who have moved or changed business address since the original USDOT issuance, the PIN reset has a chicken-and-egg problem: FMCSA mails to the address on file, which is the old address. The fix is filing a Form MCS-150 to update the address first (which can be done by a third-party filing service without the PIN), then requesting a new PIN to the updated address.

The cluster below covers the PIN recovery flow, what to do if FMCSA mail isn't reaching you, and how to confirm a successful MCS-150 update once filed.

For commercial filing services, the most common pattern is to file MCS-150 on the carrier's behalf without requiring the PIN — the service has its own FMCSA registration and submits the update through the official portal.