OK I'm putting this here because you know about clothes...........and shoes
All those recycling bins are they looking for the secret unrecognised armarni? are they looking for stuff in really good quality they can sell on or are they looking for the sort of old maybe torn or whatever stuff?
I would always know if I had anything designer
i don't unless you count Boden 
I hand my good quality saleable stuff over the counter I'm not the sort to dump it outside the shop which leaves the left overs.
i was wondering however whether they really want them eg like nike recycling shoes to tennis courts or whatever or whether I should bin them
TIA