frank
Function: transitive verb
1 a : to mark (a piece of mail) with an official signature or sign indicating the right of the sender to free mailing
b : to mail free
c : to affix to (mail) a stamp or a marking indicating the payment of postage
2 : to enable to pass or go freely or easily
- frank·able /'fra[ng]-k&-b&l/ adjective
- frank·er noun

from Sengkang Post Office