As an Amazon seller, when you receive a request for an unconditional return, you can follow the steps below to handle it:

1. Review the return request: Carefully check the details of the return request, including the reason for the return, the condition of the product, and the return period. Make sure the return request complies with Amazon's return policy.

2. Communicate with the buyer: Contact the buyer, ask the reason for the return, and provide a solution to help solve the problem. Sometimes, the buyer may just have questions about the product or encounter a problem with the use of the product, and you can provide technical support or detailed instructions.

3. Provide a return label or address: If the buyer insists on returning the product, you can provide a return label or a detailed return address so that the buyer can send the product back.

4. Check the returned product: Once you receive the returned product, you should carefully check the condition of the product. Make sure the product is consistent with the buyer's description and check for any damage or signs of use.

5. Refund processing: If the product meets the return policy and is not damaged, you should process the refund quickly. In the Orders section of Amazon Seller Central, you can choose to initiate a full refund for the buyer.

Please note that when processing unconditional returns, you should always comply with Amazon's Return Policy and Seller Service Agreement to ensure smooth resolution of the issue and maintain a good buyer-seller relationship.