You should bring your receipt, if you have one. Bring the tag that was on the clothing with the barcode (attached to the item, if it is still there)
If you're trying to return something, and you have the receipt, obviously the date is on that. Did he returning something without a receipt see, they have no idea. In this case, you'll almost always get store credit depending on the manager mostly, but that's a common company policy at most retail stores.
They could tell by the barcode
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