Of course you can’t always tell when it happens. I’ve been know to do it too if the gift is very nice and unopened E.G. I got given the same children’s book for my son from two different people so I gave one to another friend with a child of similar age to mine.
However has it ever been so obvious and not great? Last year from one particular person I got chocolates for Christmas where the best before date was around December 20th that year! I’d opened it early so I thought oh well I’ll eat them now before the 20th. Disgusting! They had very clearly been kept somewhere where they had been completely melted by the sun, then resolidified into weird shapes! I never knew chocolate could taste so bad. Im not generally that picky but they had to go straight in the bin. The box was pretty battered too. I reckon it had been shoved under her bed for ages! 😂