Caveat Emptor

let the buyer beware, principle of commerce stating that if no warranty is provided then a customer buys at his own risk

Caveat emptor is Latin for "Let the buyer beware". Generally caveat emptor is the property law doctrine that controls the sale of real property after the date of closing.
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Noun
1. a commercial principle that without a warranty the buyer takes upon himself the risk of quality
(hypernym) principle, precept

Latin expressions for "buyer beware" and "seller beware", which warn of overly risky, inadequately protected markets.

a Latin term meaning "let the buyer beware". The term implies that it is the customer's responsibility rather than the seller's to ensure that the goods or services offered for sale are able to deliver the desired satisfactions. Caveat Emptor is totally contrary to the marketing concept. See Caveat Vendor.