Postal codes are not used in Qatar，But need to fill the mailbox number.eg:
Mr. Abdullah Al Muraikhi P.O. Box No. 3263 DOHA QATAR
Mail delivery is achieved through PO boxes.Address information should be laid out on at least 3 lines with a maximum of 5 lines.
Space around the address should be left clear from colours and frames.
Water mark background, dark or colored envelopes as well as staples or metal object on envelopes should be avoided.
PO Box, City and country name should be written in English.
- BizDirLib: Qatar Business Database