Wiktionary
a. (context colloquial business of an item English) Upon receipt, damaged or defective to the point of being unusable. This condition is frequently noted in warranties on items that can't be checked before payment, and also as a valid reason for returning merchandise.
Wikipedia
Defective On Arrival is an alternate interpretation of "DOA", which stands for " dead on arrival", a term used in medical context and with the alternative colloquial/trade meaning of "At the moment of receiving the item, it was damaged or defective to the point of not being usable".
It is frequently used for expliciting a kind of warranty when a customer buys an item that can't be checked before pay (for example, eBay buying), and at the moment of make an RMA ( Return Merchandise Authorization).
Category:Commerce