SFP - Customer opens a return request on the SAME DAY THEY ORDERED

I mean seriously? A customer bought a tshirt from my store this morning, I shipped everything in the afternoon then just recently I get an auto authorised return, the same customer who bought the t-shirt this morning who has not even received it yet, wants to return it…

So as this is clearly an accidental purchase or “no longer needed” Do I just deduct the return label from their order before refund?

Kinda makes me wonder if they will just return something else and “claim” they returned the correct product.