Title
Use of Postal Code Numbers in Mail
Law
Letter Of Instructions No. 605
Decision Date
Sep 29, 1977
Letter of Instructions No. 605 mandates all government departments, local governments, and government-owned or controlled corporations in the Philippines to use postal code numbers on their mail, aiming to improve the efficiency of mail sorting and delivery in the country.
A

Mandatory Use of Postal Codes by Government Entities

  • All officials and employees of the mentioned entities are mandated to regularly use proper postal code numbers on both official and private mail.

Postal Code Placement and Format on Mail

  • Both sender and addressee postal code numbers must appear on the face of the envelope.
  • Postal codes must be written using "Arabic" numerals inside designated frames or squares without tracing the frames.
  • Ink colors allowed are black, blue, or blue-black, to ensure machine readability; pencil usage is prohibited.
  • Writing instruments to be used include ballpoint or fountain pens.

Proper Affixing of Postage Stamps

  • Postage stamps should be placed on the upper right-hand corner of the envelope's face.

Procurement and Consultation

  • Postal code numbers can be obtained from the nearest post office.
  • Additional information on using postal codes is available from local postmasters.

Handling of Bulk Mail and Window Envelopes

  • Bulk mail and letters with typewritten addresses (including those using window envelopes) should be marked with the new postal codes.
  • Such mail will be sorted manually.

Public Information and Media Cooperation

  • The Department of Public Information together with postal authorities will implement a one-year campaign.
  • All mass media outlets are required to periodically remind the public about the proper use of postal codes as part of their public service programs.

General Cooperation and Implementation

  • Emphasizes the cooperation of all concerned for the successful implementation of the postal code system.
  • Goal is to improve mail service efficiency and speed through proper use of postal codes.

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