C4 / A4 Mail Security Bags (255x360mm)

C4 / A4 Tamper Evident Security Bags are larger format, eco-friendly tamper evident bags for secure transport of A4 documents, contracts, medical records, and valuables. Manufactured from 80% post-consumer recycled material and fitted with advanced tamper-evident closure, transparent and opaque materials, dual receipts, unique numbering, and barcoding for maximum traceability. These secure single-use A4 polythene security envelopes are available from UK stocks for quick despatch, or available customised to your requirement (MOQ's apply).

The advanced tamper evident closure provides reliable protection against mechanical, temperature, and solvent-based tampering attempts. Each A5 bag features a unique numbering and barcode system (Code 128, printed multiple times across the bag and receipts), ensuring accurate tracking and accountability. Two detachable receipts make it easy to maintain audit trails for cash deposits, document transfers, or sensitive consignments. The treated white writing panels are designed for permanent recording, preventing information from being altered or wiped away.

A4 tamper evident deposit bags are ideal for securely transporting A4 documents, contracts, and sensitive records across legal, financial, and government sectors. They are also widely used in healthcare and NHS settings for patient data, prescriptions, and medical files.