I received a pair of shoes as a gift but they hurt my feet can I return them with out a receipt? I wore them around the house and a little outside.

It depends... How old are they? Do they look worn and are they dirty? U can, atleast, try. If they do accept them, U may not get money back for them but instead store credit... It's worth a try or better yet give them a call and talk to sales associate...

You may be able to exchange for a pair but they have been worn so probably no money back

No, they are worn at this point.