I made this mistake recently and sent a record to the customer before the most recent one. Largely because of a change in the way Paypal works combined with being busy. I also sent a £100 record to Germany by mistake once. I wouldn't call it stupidity but if you've never done the job you might think it is.
In my case as the seller no one else ends up out of pocket. I did receive the records back and paid for the postage and was just happy that punters would take the time to go to the post office to help me out.
Hopefully when you contact them they will do the right thing.
I've only ever bought on Discogs but sold loads on eBay and always used packing slips to stop last minute mix ups of 15 diff trainers in identical Nike boxes all being posted at the same time ;)
So I'll be sure to use them when I finally get around to selling there.
I made this mistake recently and sent a record to the customer before the most recent one. Largely because of a change in the way Paypal works combined with being busy. I also sent a £100 record to Germany by mistake once. I wouldn't call it stupidity but if you've never done the job you might think it is.
In my case as the seller no one else ends up out of pocket. I did receive the records back and paid for the postage and was just happy that punters would take the time to go to the post office to help me out.
Hopefully when you contact them they will do the right thing.