If the third party's name is written wrong on the debit note of the bank loan, you need to contact the bank in time for handling. You can correct your mistakes by the following steps:

1. Contact the bank: immediately contact the bank handling the loan, inform it that the third party name is wrong, and provide correct information.

2. Provide evidence: prepare relevant documents that can prove the correct name of the third party, such as contracts, agreements and power of attorney.

3. Written explanation: submit a written explanation to the bank, explain the reasons of the error in detail, and clearly put forward the correction requirements.

4. Follow the instructions: communicate with the contacts in the bank and follow their instructions. They may ask you to provide some additional documents or take other measures to correct the mistakes.

5. Confirm the correction: Confirm that the bank has corrected the mistakes, and get the relevant documents and confirmation letters in time to ensure that your loan documents are correct.

If you encounter difficulties or can't solve the problem, you can seek legal advice or contact the consumer protection agency for further help.