Tamper evident envelopes


Postsafe, a range of sturdy, single use, tamper evident security envelopes.  They are also known as security tamper evident bags (STEBS) and typically used for transporting valuable or sensitive goods or documents.


  • Available in white opaque or clear polythene. 
  • Weatherproof, waterproof, burst tear and puncture resistant. 
  • Double peel & seal, tamper evident enclosure.
  • Sequentially numbered with matching tear off receipt tab.
  • Write on surface.
  • 100% recyclable.


  • Suitable for traditional and new airport security applications. 
  • Strong and durable protection.
  • Quick visual integrity check.
  • Unique serial number for easy identification and verification.
  • Environmentally friendly.
  • Accepts handwriting, stamps and franking.
 Tamper evident security envelopes


Code.   Colour.   Internal size (mm).

P33      Opaque     C4 220 x 305     
P35      Opaque     C3 335 x 430     
P36      Opaque     C5 165 x 260     

PC33     Clear        C4 220 x 305     
PC35     Clear        C3 335 x 430     
PC36     Clear        C5 165 x 260     


  • Banks.
  • Security services.
  • legal.
  • Police/ Prisons.
  • Casino's.
  • Airport security.
  • Councils etc.
Tamper evident envelopes



Need a customised version ?? Contact us now. Perhaps you are looking for a reusable security envelope or bag ??

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Tamperevidence.com – simple security solutions.

As we have no control over the application and conditions our products are used in. we maintain it is the responsibility of the end user to determine that this is the correct product to suit your requirements. To that end we offer free samples and telephone guidance, please do not hesitate to contact us if you need help.