Multiple franking the postage due stamp over 2 Din. (2) on unfree mailed domestic letter from Court in Pancevo to Belgrad with dispatch stamp PANCEVO / 4 from 14.7.42 and arrival postmark BEOGRAD 2 / 4 from 16.7.42 on the letter back and on the postage due stamps as well with sticky "NIJE TRAZIO / none reclame" (unclaimed) and retour-memo to Pancevo. Because the postage due not takes the money become could, are the postage due stamps through blue pencil nullifys and turned back become. The cover is very fine. Certificate Kleymann: "such covers are rare. "