CCPA (Conference of Commonwealth Postal Administrations)
   dull surface (yellow release liner)
      without extra imprint
different imprints: Local up to 50g / Spain up to 50g / UK Letter up to 20g / EU Letter up to 20g / Worldwide up to 20g / Worldwide up to 40g

      extra imprint: Main Post Office

   glossy surface (transparent release liner)

      extra imprint: Mail Centre

      extra imprint: Parcel Office