My mom bought this Nuevo h2o water softner for my dad's birthday but my brother already bought the better one quality one, the problem is my dog chew the receipt of the one my mom bought. It brand new never open. Can I still able to return it

If it was purchased with atm or credit, they will find the transaction. If it was paid in cash or check , you may get a credit.

Yes you should be able to return it at the store you purchased it will give you an in-store credit

You will have to take it to the original store from purchase. You most likely will get store credit.

If it was an electronic purchase and you return to the same store, you should be able to return it.

Best to call for further information