Security Poly Mailer

Define the visible indication needed after an opening attempt, including whether damage should appear on the flap, seam or body. Test the proposed construction after normal dwell and storage. A security design should have a recognizable inspection result, not only a warning printed on the bag.

Specify opacity separately from tamper evidence and evaluate it around the actual contents. Inspect under strong lighting and at stretched corners. Decide whether inner documents need an additional opaque sleeve, especially when visible account details or product identity would defeat the purpose of the mailer.

Test properly sealed, filled parcels through the expected handling environment and inspect flap edges and seams. Define acceptable wear separately from an opened closure. Keep reference photographs so receiving staff can distinguish normal abrasion from the evidence the security feature is intended to reveal.

Provide the item, packed weight, required opacity, closure process and any serial or receipt features. Describe who checks the parcel and at what stage. Ask for the proposed security mechanism to be documented and approved on samples before relying on it operationally.