Japanese phrase
___は消印有効ですか？ ___ wa keshiin yū kō de su ka
Meaning
Does ___ count if it is postmarked by the deadline?
When to use it
Asks whether a postmark meets a submission deadline. It is common in application guidelines and checks whether mailing by the deadline is enough even when delivery comes later.
Example dialogue
この応募は消印有効ですか？ ko no ō bo wa keshiin yū kō de su ka
Does this application count if it is postmarked by the deadline?
はい、締切日の消印があれば大丈夫です。 ha i shime kiri hi no keshiin ga a re ba dai jō bu de su
Yes, it is fine if it has a postmark dated by the deadline.