I made a mistake getting my authority – I Wasn’t Ready
To close your USDOT number record you MUST mail, fax or upload via our web form an updated and signed MCS-150 (Motor Carriers) or MCS-150B (Hazmat Carriers) form, and check the box “out of business” (out of “motor carrier” operations, even if the company is still in business) in the “reason for filing” section.