What would you think if you were given clothes as a present but they did not have any tags on? So the shop label is still sewn in, but there is no plastic tag with cardboard bit.
I received two items of clothing like this this Christmas. I've never thought particularly deeply about it (the givers always give me clothes at Christmas), but now I'm thinking that they are buying them in jumble sales or regifting things they've had for ages.
I am grateful to get anything and I am not bothered about presents particularly, but I never like the clothes and they never fit anyway, but I think if I asked if they still had the receipt it would be awkward.