1, the process of buying a used car license plate number is as follows:

(1) transaction, and fill in the transaction transfer bill;

(2) vehicle external inspection, check whether the engine number and large shelf number are consistent with the original vehicle;

(3) Number selection, because used cars are not allowed to choose personal license plates, so only one of five ways can be selected for number selection;

(4) Replace the license plate, replace the old license plate with a new license plate, and affix the inspection mark.

2. Legal basis: Article 22 of the Measures for the Administration of the Circulation of Used Cars.

After the second-hand car transaction is completed, the current owner shall go through the transfer registration formalities in accordance with the relevant provisions of laws and regulations with the unified invoice supervised by the tax authorities.

Article 23

Operators of the second-hand car trading market shall provide fixed places and facilities for the second-hand car business entities, and provide conditions for customers to handle the procedures of second-hand car appraisal and evaluation, transfer registration, insurance and tax payment. Second-hand car distribution enterprises and brokerage institutions shall, according to the requirements of customers, handle the procedures of second-hand car evaluation, transfer registration, insurance and tax payment.

Second, how to transfer ownership when buying a used car?

1. The operating company fills in the Inquiry Form of Motor Vehicle Theft and Robbery, sends the vehicle to the vehicle inspection station in the market, checks the steel grades of the vehicle engine and frame, and tests the performance and emission status of the vehicle, which is signed and sealed by the resident police;

2. The operating company fills in the Power of Attorney for Appraisal and Evaluation, and submits it to the on-site vehicle appraisal and evaluation station for appraisal and evaluation, and issues appraisal and evaluation conclusions;

3, by the market accreditation department to conduct a comprehensive review of materials, and according to the unified form for registration;

4, by the operating company unified settlement to the market charge office;

5. On-site industrial and commercial personnel verify the materials required for the transaction;

6. The personnel of the market accreditation department shall go to the resident institution of the public security vehicle management office to handle the transfer procedures of vehicle files and certificates.