I sent a couple of bras back a while ago and they never arrived. DP had taken them to the PO for me and didn't get a receipt, so I gave him a massive bollocking and wrote it off - they were on sale so not ££. But now I have sent another lot back, total cost over £70. DP says PO said they don't do receipts as it's 2nd class post (??). He sent them a week ago and they've not acknowledged receipt yet. I'll give it a few more days before panicking, but I'll be seriously annoyed if it happens again.