Street name and the number is traditionally separated by a comma, but nowadays CTT recommends just a blank space, or two blank spaces for extra clarity; this is to avoid OCR mistakes. The º after the number is the ordinal for floor number. Usually followed by "Esq." (Left, abbr from "Esquerdo") or "Dir." (Right, abbr from "Direito"), or an apartment letter (A, B, C, etc.). PO Boxes are called Apartado, followed by a number (e.g., Apartado 1001). Qatar In Qatar, Q-Post recommends the following format: Not all of Qatar's roads and buildings are numbered, Q-Post doesn't deliver to any street addresses, and no postal codes are used in Qatar. Romania In Romania, the address is generally formatted as follows: According to NACREP - National agency for cadastral and real estate publicity (in Romanian ANCPI - Agenția Națională de Cadastru și publicitate imobiliară) in Romania there are 29 street types such as: Russia In Russia, the address must be written in Cyrillic or Latin alphabet, in usual format (from most specific to general). Example: Note: sub-region and region/oblast names are void if the city is Moscow or Saint Petersburg or if it is sub-region administrative center. Some neighbourhoods may be planned in such a way that some, or most, apartment buildings face no named street. In this case, a number of expedients can be used. In older neighbourhoods, such as the historical center of Moscow, a "main" building may have the same number as one or more "subsidiary" buildings accessible via driveways behind the main building. They will be addressed as, for example, ul. Lenina, d. 123 (that is, 123 Lenin St). An address may also cover one or more subsidiary buildings behind the main building, addressed as ul. Lenina, d. 123, str. 2 (123 Lenin St, Unit 2, where str. (abbreviation for строение, stroenie) means a 'subsidiary building'). In newer areas with more regular street plans, apartment buildings that face no named street may be designated with Cyrillic letters appended to the building number, such as 123-а, 123-б, etc., in alphabetic order. In some microraion neighbourhoods, with few, if any, buildings facing named streets, the name (or more likely number of the microraion (planned housing development)) would be used instead of the street name; thus someone may live at 4-th microrayon, d. 123, kv. 56, that is, 123 - 4th Microraion, apt. 56. Saudi Arabia In Saudi Arabia, the address