料金 りょうきん別納 べつのう郵便 ゆうびんだったら
ryōkimbetsunō yūbindattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 料金別納郵便

1. If it were cash-on-delivery mail.; If it is cash-on-delivery mail.

Tara Conditional