料金 りょうきん後納 こうのう郵便 ゆうびんではありませんでした
ryōkinkōnōyūbindewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 料金後納郵便

1. It was not post-paid postage.; It was not a postage-due item.

Past/Perfective
Negative
Polite
Formal Register