Verify the identity information of the borrower, check the authenticity of the contract, confirm the legality of the collateral, improve the contract content and file it for the record.

1. Verify the borrower's identity information: Banks need to ensure that the borrower's identity information is consistent with the information in the contract to prevent the contract from being forged or tampered with.

2. Check the authenticity of the contract: the bank needs to confirm whether the original and copy of the loan contract and the mortgage contract are consistent, so as to prevent the false contract or the contract from being tampered with.

3. Confirm the legality of collateral: Banks need to verify the ownership certificate of collateral to ensure the legality and authenticity of collateral.

4. Improve the content of the contract: Banks need to improve some clauses and details in the loan contract and mortgage contract to ensure the integrity and legality of the contract.

5. Archiving: Banks archive loan contracts and mortgage contracts for reference and tracking in subsequent loan management and risk control.