Returning wrong item back to seller after receiving correct one

Question

Hi, I had an item in the post from a seller which was incorrect. The seller now wants the incorrect item back through Royal Mail as he has now sent me the correct item, (so this is not a normal Ebay return request where a label gets issued.)Despite the parcel being already opened he advised me to return as he instructed below:'Regarding the return of the incorrect item...If you still have the envelope then please put the product inside the same envelope, cross your address and ma...

papso22 · Accepted Answer

You cannot do that.  The seller is trying to get RM to pay for his mistake.   If they want the wrong item back they need to give you a prepaid label or send you the money for the postage.