1) Clog danced 2) Embossed 3) Imprinted 4) Like many passports 5) Like passports 6) Like some feet and envelopes 7) Marked 8) Pressed 9) Printed 10) Readied for mailing 11) Ready for mailing 12) Ready for the post office 13) Ready to mail 14) Ready to post 15) Sealed 1) Impressed 2) Imprinted 3) Postpaid 
Stamped is iPhone app launched by a team of (mostly) former Google employees in November 2011 which keep tracks and share the things you like in social medias. Later it was acquired by Yahoo. ...
• (imp. & p. p.) of Stamp
[adj] - marked with the impression of a seal
adjective marked with the impression of a seal