postmark
US /ˈpoʊst.mɑːrk/
UK /ˈpoʊst.mɑːrk/

1.
cap pos, setem pos
an official mark stamped on a letter or parcel at a post office, indicating the place and date of posting and cancelling the stamp
:
•
The letter had a clear postmark from London.
Surat itu mempunyai cap pos yang jelas dari London.
•
Check the postmark to see when it was sent.
Periksa cap pos untuk melihat bila ia dihantar.