Initially when the zip code system began in the United States, it was adopted as a non-mandatory system. This means that not all parts of the country was making use of the zip code system. There were some parts of the country that were registered under the zip code system and there were some other parts of the country that were not even part of the system.
As time went on and the zip code system was utilized, a whole lot of changes were noticed in the mail delivery system of those areas that were originally registered under the zip code system. These areas were actually experiencing a hitch free mail delivery system and the issue of improper or unprofessional delivery of mail was a total thing of the past in these areas.
The United States post office department took notice of this situation and then decided to bring about a change into the way in which things are operated in the postal agency of the country. The areas that were not registered under the zip code system were not experiencing the same swift action and progress that those that were registered with the zip code system were experiencing.
This situation then forced the United States government to conclude plans to make the operation of the zip code system a mandatory one. In this way, all regions and cities of the country will be registered under the zip code system with the hope that the positive outcome that was experienced in the initially registered regions will be transferred to those areas that were newly registered.
As soon as the operation of the zip code system became mandatory, the wave of positive change swept all through the whole of the country and the operation of the postal agency received a great boost that really set thing right in the way mails are being posted in the country.
Before you can enjoy the transformation anyway, you will need to play your part. The part you need to play as a mail sender is to endeavor to include the particular zip code of the area where you are sending your mail to.