Korean phrase
~ 소인 유효인가요? ~ so in yu hyo in ga yo
Meaning
Is the postmark on ___ valid?
When to use it
This asks whether a postmark is valid. It is a polite question used to check whether the date on the postmark is clear enough to count.
Example dialogue
이 봉투에 찍힌 소인 유효인가요? i pong tu e jji kin so in yu hyo in ga yo
Is the postmark on this envelope valid?
네, 날짜가 선명해서 유효합니다. ne nal jja ga seon myeong hae seo yu hyo ham ni da
Yes, the date is clear, so it is valid.