Temu is a P2P online lending platform. When users apply for loans on the platform, they need to pay a certain security deposit. If you need to refund Temu's security deposit, you can follow the steps below:

1. Log in to Temu's official website, find the fund account in the personal center, and check your security deposit balance.

2. Make sure that all your borrowing and repayments have been processed and there is no overdue payment.

3. Find the online customer service on the official website, explain to the customer service that you need to refund the security deposit and provide relevant information.

4. The customer service will provide you with a refund application form. You need to fill in the application form correctly and provide your account information and contact information.

5. After submitting the refund application form, you need to wait for the approval of the platform staff, which may take some time.

6. After the refund is successful, your security deposit will be returned to your account.

It should be noted that the Temu platform's regulations on security deposit refunds may be adjusted according to different situations and policies, and the specific refund process may be different. Therefore, before applying for a refund of the deposit, please carefully read the platform's refund policy and communicate and confirm with the platform's customer service.