Note that there may sometimes be a confusion between (, postal code (of the local post office)) and (, P.O. (post office box), the individual physical P.O. box of a specific address or a subscription-based physical P.O. box inside a post-office branch). The convention is that the addressee's information is written on the bottom right portion of the letter. The sender's information is written either on the top left portion of the letter or on the top reverse side of the letter (except for parcel packages). Domestic post letters, parcels and postal money transfers are written in Bulgarian Cyrillic while the international postal letters and parcels are written in the Latin script (usually in English due to its global usage) with Arabic numerals. Apart delivering mail and parcel packages to individual addresses, the Bulgarian Posts also delivers to local post offices (which then notify the recipient that he/she has mail to collect from the post office; so-called (letters on demand/request)) or to a subscription mailbox within a local post office. Examples of a correctly formatted postal address: Format for mail exchange between private individuals (): Format for mail and parcel exchange between business partners (): Format for mail and parcel sending to an individual subscription mailbox within a local office of Bulgarian Posts (): The Bulgarian postal addressing guidelines are registered with the Universal Postal Union (UPU and see the link Universal Postal Union – Postal addressing systems in member countries). These guidelines indicate exactly how to combine the various address components in order to obtain a correctly formatted postal address. The complete set of addressing guidelines can be found on the website of the Bulgarian postal operator (Bulgarian Posts). The correct representation of an address is not limited to the correct structure of address components but also relates to the content of addresses and their position on envelopes (see Български пощи ( Български пощи ) (in Bulgarian)). It is also possible to validate a Bulgarian postal address on Bulgarian Posts' website and to receive feedback on the content and the format of an address. More information can be found at (see Български пощи (in Bulgarian)). Canada Addressing guidelines can differ between English- and French-speaking populations in Canada. Here are some formatting rules that are used in common: Cardinal directions like North, North West, etc. can be abbreviated in either English or French, and appear after the street name. Ordinal