Legal analysis: I want to get the Green Paper back after paying off the car loan. The specific operation is: 1. Prepare the materials required for the cancellation of automobile mortgage, such as the original and photocopy of the mortgagor's ID card, the application form for motor vehicle mortgage registration/pledge, and the motor vehicle registration certificate. 2. Take the prepared materials to the vehicle management office for understanding; You can get the green paper back after the formalities are completed.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.

Article 668 A loan contract shall be in written form, unless otherwise agreed between natural persons.

The contents of a loan contract generally include terms such as loan type, currency, purpose, amount, interest rate, term and repayment method.

Article 669 When concluding a loan contract, the borrower shall, at the request of the lender, provide the true information about the business activities and financial status related to the loan.