WNS Resources

Promotional material

Discover the WNS Promotional Toolkit – a shared space with multilingual ready-to-use brochures, banners and digital assets to highlight your country’s stamp issues and strengthen the visibility of the WNS globally.

Registration documentation

Step-by-step tutorial

The essential guide for an easier and faster registration.


  • Official notification form
    16.10.2025
    This form may be used to notify the International Bureau of the UPU of new official stamp issues member countries wish to be registered to the WADP Numbering System (WNS).

    However, designated operators and postal authorities are strongly encouraged to use the online member platform available on the WNS website, which allows for faster and more accurate data entry.

    The below form should be used only in cases where online submission is not possible.
    English French Arabic Spanish Portuguese Russian

General Conditions of WNS Participation

  • General Conditions of WNS Participation
    16.10.2025
    English French