ZIP Code is a significant part of an address when mailing letters or packages. Adding the ZIP Code increases the rapidity, accuracy and quality of all mail services by the Philippine Postal Corporation. Mail with a ZIP Code can be processed and pre-sorted quickly and results in a quicker and more accurate delivery, benefiting both the sender and the addressee.
ZIP is an acronym for Zone Improvement Plan. The ZIP Codes was first used by the United States Postal Service and was later adopted by the Philippines. The difference between the U.S. and the Philippine ZIP Code is that the U.S. ZIP Code has five (5) digits (and sometimes with an additional four digits for a more accurate delivery of mail) while the Philippine Postal Corporation uses only a four digit ZIP Code. "ZIP" is always spelled in capital letters.
In the Philippines, the Philippine ZIP Code is used by the Philippine Postal Corporation (Philpost) to simplify the distribution of mail. While in function, it is similar to the ZIP Code used in the United States, its form and its usage is quite different.
The use of ZIP Codes in the Philippines are not obligatory, however it is highly recommended by Philpost that they will be used. Also, unlike American ZIP Codes, the Philippine code is a four-digit number representing two things: in Metro Manila, a barangay within a city or city district (as in the case for Manila), and outside Metro Manila, a town or city.
