BTW, Make sure the rebate hasn't expired and that you can submit one before the cutoff. This is all pending you're able to get a receipt. Check with your bank card company and sometimes reciepts are e-mailed if linked to your purchase card.
If you paid by a card you may be able to get a receipt for the dehumidifier but if not I don't see any way that you can prove that you bought it.
If you were a member of the savings catcher program, you could locate an actual copy of the receipt in your purchase and submission history.
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