When registering an untitled trailer, one of the following documents must be submitted. The document required depends on the ownership and registration history of the trailer:

1. Manufacturer’s Statement of Origin (MSO):
   • The MSO may be issued directly to the consumer. It must include the trailer's description and all required ownership details.
2. Certificate of Title:
   • A properly assigned certificate of title indicating ownership transfer is required if trailer currently titled.
3. Trailer’s Last Registration and Bill of Sale:
   • Required if the trailer is a new purchase and no previous title has been issued.  A copy of the last registration issued may be accepted (originals are not required).
   • If last registration is not available, county treasurer’s office may verify seller, as listed on bill of sale, was last owner of record via a check of the title and registration computer system.
4. Bill of Sale:
   • Accepted for a trailer with no previous Nebraska registration.
5. U.S. Military Registered Trailers:
   • A valid U.S. Military Registration Document is required.
6. Trailers Sold by the U.S. Government:
   • Form SF97, a U.S. government-issued certificate is required.
7. Untitled Trailer Affidavit:
   • If no title, registration, or MSO is available, a notarized Untitled Trailer Affidavit must be completed and submitted to affirm ownership.