代行 だいこう受信 じゅしん しゃ登録 とうろくだったら
daikōjushinshatōrokudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 代行受信者登録

1. If/when a forwarding receiver registration…; If it were a forwarding receiver registration…

Tara Conditional
Computing