When I pick up a loaded trailer at a shipper, or after they load an empty trailer that I brought, they give me a bill of lading, paperwork that I eventually give to the receiver, and present to law enforcement if necessary.

The BoL includes details about the freight, from/to parties, the carrier (me), etc. And the serial number of the trailer seal.

Sometimes I notice that the number on the seal doesn't match the paper work. I take the paperwork to the shipping office. They either print out corrected paperwork, or they use whiteout (or Liquid Paper) to cover the incorrect number and write in the correct one.