TAMPER-EVIDENT SECURITY BAGS

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Protection and control at every stage of transport

Tamper-Evident Security Bags are packaging solutions that not only protect against damage, but above all provide clear evidence that no unauthorised access to the shipment contents occurred during transport or storage.
Documents, cash, samples, and other valuable small items require reliable tamper control. That is why tamper-evident mailers are designed with mechanical, thermal, or chemical security features that prevent undetected access to the contents.
We tailor tamper-evident security bags to specific processes and individual customer requirements.

What makes tamper-evident security bags stand out?

From the outside, they resemble standard poly mailers – lightweight, easy to pack, and requiring no additional packaging materials. However, once sealed, the mailer cannot be opened without leaving visible evidence of tampering. Any attempt to interfere with the package becomes immediately noticeable, whether through material damage or visible marks on the adhesive area. Despite their additional security function, tamper-evident mailers do not complicate the packing process. Handling remains just as simple as with standard courier poly mailers, without the need for extra protective measures.

This is an excellent solution that eliminates uncertainty, especially in processes where the following are critical:

  • accountability for transferred materials,
  • shipment traceability,
  • compliance with internal procedures or audit requirements.

Specifications

PARAMETER VALUE
Material high-strength three-layer LDPE, HDPE, or MDPE film
Resistance tear, moisture, and mechanical damage resistance
Print high-resolution multicolour graphics
Additional options internal bubble wrap lining, external paper labels, document pouch, microprint, perforation (vent holes)
Colours most commonly coloured (for content protection) or transparent

Tamper-evident security bags – available variants and security features

Various mailer formats are available and can be tailored to specific shipment types. In addition to size options, different security levels can be selected — from basic protection to advanced solutions used for confidential documents and valuables handling.

Request a quote for tamper-evident security bags

Once you submit the form, our sales advisor will contact you within a maximum of 24 hours, answer all your questions, and prepare a tailored offer.


    As a manufacturer and distributor we sell products in wholesale quantities. We do not process retail orders.

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    Depending on the selected variant, tamper-evident security bags may include features such as:
    • individual numbering and barcodes, enabling easier shipment tracking within internal systems.
    • destructible security prints placed beneath the tamper-evident adhesive strip, which become damaged when an opening attempt is made.
    • codes that change colour under UV light
    • control coupons with matching numbering and codes, allowing the mailer to be linked to documentation or a specific process.
    • special seal types with microprint applied along the edges of the mailer.
    • security adhesive tapes with mechanical, thermal, and chemical protection options, designed to react to tampering attempts.

    These solutions not only make unauthorised opening significantly more difficult, but above all ensure that any tampering attempt becomes immediately visible.

    The effectiveness of the applied security features has been confirmed through testing conducted by ISEGA GmbH – a German research institute specialising, among others, in packaging material testing.

    Where are tamper-evident security bags used?

    They are most commonly used wherever the shipment contents carry not only material value, but also operational importance:

    • Confidential documents
    • Financial shipments (cash reports, cash handling)
    • Product samples
    • Small high-value items
    • Internal shipments between company branches.
    • Most commonly used in banking, administration, logistics, and manufacturing companies.
    Tamper-evident Security Bags

    Discover other Mac-Graf solutions as well

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    COMPOSTABLE MAILER BAGS

    Your customers will appreciate your commitment to sustainability. These poly mailers decompose within approximately 3–6 months.

    Poly bubble mailers

    They protect products against shocks and breakage. Recyclable, lightweight, and a cost-effective alternative to cardboard boxes and bubble wrap.

    Answers to Frequently Asked Questions – FAQ

    No. The construction of the mailer ensures that any opening attempt leaves visible evidence either on the material itself or in the adhesive sealing area.
    No. The adhesive strip itself acts as the security feature, eliminating the need for additional seals or tapes.
    Yes. Their handling is no different from standard poly mailers, allowing them to be implemented without organisational changes to the packing process.
    Yes. It is possible to add custom printing, numbering, or other features supporting shipment identification.
    Yes, they are designed for standard logistics operations and provide high resistance to transport conditions.