In the Rieker show, in her attempt to sell us on QVC's "try before you buy" (non) policy, Marv has invented this scenario : she walked out of a shop, with her purchase, and looked at her receipt - as one does. Shock! Horror! The customer has 14 days in which to return said item. I don't think too many of us will be surprised to know this. Having said this, it depends on the store.