Security Bags and Envelopes

Security bags, security envelopes and security pouches are tamper-evident solutions designed to protect sensitive items in transit or storage. Our range includes tamper-evident bags and single-use security envelopes, plus durable reusable security pouches for cash-in-transit, secure mail & logistics, confidential documents, healthcare sample transport, and police and forensic evidence handling. Each bag provides clear tamper evidence, with options such as VOID closures, sequential numbering and barcode tracking to support traceability and compliance. Choose from popular sizes including A5, A4 and A3 (flat or gusseted), with custom printing available - see our customised security bags.

Secure tamper-evident (tamperproof) bags and envelopes reduce the risk when transporting valuable or sensitive items, providing an additional layer of security and a deterrent to theft or fraud. Our solutions deliver trusted security for organisations across logistics, healthcare, retail, banking, government and law enforcement.

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Picture of Tamper Evident Security Bags. C5/C4/C3 Picture of Tamper Evident Security Bags. C5/C4/C3
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Tamper Evident Security Bags. C5/C4/C3

From £22.00
Tamper Evident Security Bags. 80% Recycled Content. C5, C4 & C3 Sizes.
Picture of C4 / A4 Mail Security Bags, Pk-100pcs Picture of C4 / A4 Mail Security Bags, Pk-100pcs
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C4 / A4 Mail Security Bags, Pk-100pcs

From £29.00
A4 Single-Use Tamper-evident Security Bags for Secure Mail, Evidence & Valuables. 100pcs per pack
Picture of Customised Tamper-evident Security Bags Picture of Customised Tamper-evident Security Bags
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Customised Tamper-evident Security Bags

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Fully customised single-trip security bags for secure transport of confidential items. 100% recyclable material.
Cash Bags in 3 sizes Choice of colours
MADE TO ORDER

Re-usable, Tamper-evident Cash Bags

From £65.00
Tamper-evident money bags for reliable cash-in-transit, valuables and retail use
Picture of Re-usable & Secure Key Wallets Picture of Re-usable & Secure Key Wallets
MADE TO ORDER

Re-usable & Secure Key Wallets

From £55.00
Secure tamper-evident key wallets for controlled keyholding
Picture of Re-usable Internal Mail Pouches Picture of Re-usable Internal Mail Pouches
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Re-usable Internal Mail Pouches

From £55.00
Colour-coded, internal mail pouches for movements and handling
Security mail pouches Mail pouch colours
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Flat Security Mail Pouch (Long-edge zip)

From £39.50
Durable reusable mailing pouch for secure transport of sensitive mail and documents. Closure across long edge.
Picture of Flat Security Mail Pouch (Short-edge zip) Picture of Flat Security Mail Pouch (Short-edge zip)
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Flat Security Mail Pouch (Short-edge zip)

From £35.00
Low-cost secure mailing for smaller mail items and documents. Zip closure across short edge.
Picture of Security Mailing Pouches (Full Gusset) Picture of Security Mailing Pouches (Full Gusset)
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Security Mailing Pouches (Full Gusset)

From £65.00
Reusable and secure mailing pouches for bulkier items and documents, with full-gusset
Picture of Security Mailing Pouches (Bottom Gusset) Picture of Security Mailing Pouches (Bottom Gusset)
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Security Mailing Pouches (Bottom Gusset)

From £60.00
Secure mailing pouches for heavy documents, with bottom gusset
Picture of Tamper-evident Security Holdalls Picture of Tamper-evident Security Holdalls
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Tamper-evident Security Holdalls

From £100.00
Reusable security holdalls for tamper-evident bulk transport of valuables, documents & equipment.
Picture of Button Seals for Security Pouches Picture of Button Seals for Security Pouches
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Button Seals for Security Pouches

From £30.00
Button seals for securing cash bags & mailing pouches. Standard or customised.
Medical Pharmacy bags with and without handles Medical pharmacy bag without handles
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Medical Pharmacy Bags

From £37.50
Tamper-evident padded pharmacy bag for secure transfer of prescriptions between wards and departments.
cytotoxic drug bag Button Seals
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Secure Cytotoxic Drug Bags

From £33.00
Reusable tamper-evident cytotoxic bags for controlled handling of toxic or hazardous drugs
Picture of SecureLab 95 - ADR Specimen Bags for Transport by Road Picture of SecureLab 95 - ADR Specimen Bags for Transport by Road
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SecureLab 95 - ADR Specimen Bags for Transport by Road

From £21.00
95kPa Medical Specimen Bags for Transport of Infectious Substances by Road. UN3373 Compliant.
Picture of SecureLab 95 - IATA Specimen Bags for Transport by Air Picture of SecureLab 95 - IATA Specimen Bags for Transport by Air
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SecureLab 95 - IATA Specimen Bags for Transport by Air

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Medical Specimen Bags suitable for transport by air under IATA Regs. Compliant with UN3373 & PI650 Requirements.
Picture of SecureLab COOL - Insulated Sample Transport Bag Picture of SecureLab COOL - Insulated Sample Transport Bag

SecureLab COOL - Insulated Sample Transport Bag

From £175.00
Insulated medical carrier for transporting diagnostic and biological samples under UN3373 regulations.
Picture of SecureLab CHILL - Insulated Medical Carrier Picture of SecureLab CHILL - Insulated Medical Carrier
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MADE TO ORDER

SecureLab CHILL - Insulated Medical Carrier

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UN3373 rugged and insulated medical carrier for laboratory specimen transport
Heavy-duty woven polypropylene security sack with sealing eyelets Picture of Heavy-duty Woven PP Security Sacks
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Heavy-duty Woven PP Security Sacks

From £19.50
Strong heavy-duty sacks in durable woven PP material, with eyelets for security sealing. 50KG weight
Picture of C5 / A5 Mail Security Bags (180x260mm) Picture of C5 / A5 Mail Security Bags (180x260mm)
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C5 / A5 Mail Security Bags (180x260mm)

From £22.00
A5 Single-Use Tamper-evident Security Bags for Secure Mail, Evidence & Valuables
Picture of C4 / A4 Mail Security Bags (255x360mm) Picture of C4 / A4 Mail Security Bags (255x360mm)
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C4 / A4 Mail Security Bags (255x360mm)

From £29.00
A4 Single-Use Tamper-evident Security Bags for Secure Mail, Evidence & Valuables
Picture of C3 / A3 Mail Security Bags (330x475mm) Picture of C3 / A3 Mail Security Bags (330x475mm)
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C3 / A3 Mail Security Bags (330x475mm)

From £33.00
A3 Single-Use Mail Security bags with tamper seal for bulkier items and parcels

Frequently Asked Questions

What are security bags?

Security bags are tamper-evident bags used to protect cash, confidential documents, medical items or evidence in transit or storage. They show clear signs of interference (for example a VOID closure or numbered seal) and often support tracking with sequential numbering or barcodes.

What is a security envelope?

A security envelope is a tamper-evident mailing envelope designed to protect confidential documents and show clear evidence if opened or interfered with. Their tamper-evident features act as a deterrent to unauthorised access, ensuring that contents remain secure during transit.

What is the difference between standard envelopes and security envelopes?

The main difference between standard and security envelopes lies in their construction and purpose. Standard envelopes are for general post; security envelopes use tamper-evident closures and tougher materials to reduce unauthorised access to documents.

Single-use vs reusable security bags: what’s the difference?

Single-use security bags are sealed once and then disposed of (ideally recycled). Our single use security envelopes are manufactured with high proportions of post-consumer recycled materials, making them as environmentally friendly as possible. On the other hand, reusable security pouches are made with stronger materials like PVC and are re-used with replaceable seals, making them cost-effective for repeated secure transport.

Are security bags the same as tamper-evident bags?

“Security bag” is the broad term; tamper-evident bags are security bags designed to reveal interference (often searched as tamper evident or tamperproof bags).

What are security bags used for?

They are commonly used in the following sectors:

  • Healthcare & Laboratories – transport patient samples, prescriptions and medical records

  • Cash Handling & Banking – deposit bags for cash-in-transit with tamper-evident seals

  • Mail & Courier Services – protect confidential letters, contracts and documents

  • Retail & Hospitality – safeguard daily takings during transport to banks

  • Forensics & Evidence – seal and track evidence bags with complete chain of custody