Post codes are important in mail delivery and efficient postal services. It is a combination of letters and numbers used to identify a postal area. There are many different terms that are used around the world for post codes, which may be confusing, especially if you are living in a foreign country. In some countries, post codes are also known as zip codes or postcode. In Germany and Austria, it is known as "Postleitzahl," while in France, it is called "code postal." Other synonyms for post code include routing code, PIN code, Eircode (in Ireland), and CEP (in Brazil). Regardless of the name used, it is vital to know and use the correct post code in your mail delivery.