返信 へんしん よう封筒 ふうとうじゃなかったです
henshin'yō fūtōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 返信用封筒

1. Was not a return envelope.; Wasn't a reply envelope.

Past/Perfective
Negative
Polite
Casual Register