paypal refund

I have an unhappy client here who is asking me to refund him or he will ask PayPal for refund him. He is not satisfied with my work. I don't know what to do at this point. Should I just refund him his money or wait? Any ideas BHW?

When a customer opens a dispute and asks for a refund, how does Paypal decide whether to close the case in your or in the customer's favor ? What about when the tracking number shows it was shipped on a later date than when the customer open the dispute ? (e.g : customer opens dispute today...

Hello! Is there any Paypal refund guide? I am pretty new to paypal and I found out, you can refund your items. Tried to find something here, but everything I read left even more questions. Can you refund practicly everything? How many $ item max to refund, not to be suspicious? Should I...