I bought a keurig coffe machine at this store 2 years ago and font have the receipt for it but it stuck on a coffe cup size and i cant change for the differents cup sizes it had before, would i be able to return it without the receipt?

If you brought the cooffee machine 2 years ago, send it back to the manufacturer. Because it would be under their warranty/ guarantee. Bed Bath and Beyond are the sellers and will only be responsible for the first 30 days under their contract of damaged items.

If you bought it on a credit card,I believe they can look up the transaction for you through that.