Postage stamp design its rule which stated that a country's name had to appear on their postage stamps, so a profile of the reigning monarch was all that was required for identification of Britain's stamps. To this day the UK remains the only country not required to name itself on its stamps. For all other UPU members, the name must appear in Latin letters. The name chosen is typically the country's own name for itself, with a modern trend towards using simpler and shorter forms, or abbreviations. For instance, the Republic of South Africa inscribes with "RSA", while Jordan originally used "The Hashemite
Postage stamps and postal history of South Sudan (see illustration). South Sudan is also using postage stamps for other than postage usage. For instance, the application fees for a post office box, 5 SSP, is paid in the form of five 1 SSP stamps, pasted on the application form itself. The central Government of South Sudan, however, has not issued any national revenue stamps. Only Central Equatoria State is known to have issued its own state revenue stamps, which are used on certain documents issued by the state, like Age Assessment Certificates. Central Equatoria State has been using also after independence of South Sudan the old three revenue