Ordered some bits online and collected them from TLC. Guy brought them to the counter in a couple of carrier bags. Only when getting home did I notice only three out of four of the same item were present (I'd bought several different things at once) Moral being check everything carefully no matter how much you hold up the queue behind you.
Did much the same with ToolStation. Some of the items I wanted weren't stock at my local branch. On collection, they were in two sealed cardboard boxes. Asked the assistant to open them to check everything I'd ordered and paid for was there. She wasn't happy and had to go and find some scissors to do this. And in one of the packages, a tin of paint had split open and spilled its contents. But just inside the plastic bag it was wrapped in, so not showing on the outside.
Took a further 1/4 hour or so for her to order up a replacement for collection later.