All folded mail must be completely sealed on all sides and edges. Spot sealing or stapling is disallowed. For folders, it is compulsory to indicate on the sealing flap “Glue all sides firmly.” Stapling & spot sealing is disallowed. The folders must be at least 80gsm if double-folded & 100gsm if single folded.
Business Reply Envelope (A4 size)
