How Police Evidence Bags Protect Crime Scene Integrity

Introduction

Police evidence bags are vital tools for law enforcement. They keep crime scene items safe from tampering, contamination, and loss. Each bag is designed to maintain the chain of custody, which records who handled the evidence and when. A single mistake — like a broken seal or missing label — can make evidence inadmissible in court.

Tamper-evident materials and secure seals protect the evidence’s integrity from the scene to the courtroom. Using the right bag also helps investigators trust that every item remains in its original condition. Police departments use different types and sizes of bags to protect various evidence, ensuring safety and traceability throughout the investigation.

Types of Evidence Bags

Plastic Evidence Bags
Plastic evidence bags are strong, waterproof, and transparent. Officers can see what’s inside without opening them. These bags are ideal for dry items such as documents, weapons, or narcotics. Many have built-in seals that show a clear “VOID” message if tampered with. They also include serial numbers or barcodes for tracking and auditing.

Paper Evidence Bags
Paper bags are best for biological or wet evidence. Because they breathe, moisture can escape, preventing mold or DNA damage. Officers usually seal them with tamper-evident tape and sign across the seal. While paper isn’t waterproof, it keeps biological samples stable.

Choosing the Right Type
Plastic and paper bags both safeguard evidence, but each serves a specific need. Police often use one bag per item to prevent contamination. Selecting the correct material is key to preserving forensic value.

Key Features of  Tamper-Evident Bags

Modern evidence bags are designed for security and traceability.
Main features include:

  • Tamper-evident seal: Displays “VOID” or color change if opened.

  • Unique serial number: Ensures traceability in custody logs.

  • Writable label area: Records case ID, item, collector, and time.

  • Durable film or kraft paper: Prevents tearing and leaks.

  • Optional pouch or receipt: Keeps forms attached and trackable.

These features make evidence bags reliable tools for protecting truth and transparency.

Proper Use and Chain of Custody

  1. Label Before Use: Record case details before inserting evidence.

  2. Seal Immediately: Use adhesive or tape and sign across the seal.

  3. One Bag per Item: Avoid mixing evidence to prevent confusion.

  4. Handle Biological Samples Carefully: Let them dry before sealing.

  5. Record Every Transfer: Maintain custody logs and serial numbers.

Each action proves that the evidence remained safe and unchanged.

Conclusion

Police evidence bags are more than simple containers — they are proof of integrity. Proper use ensures evidence remains authentic, traceable, and admissible in court.

Manufacturers like Adsure Packaging provide tamper-evident security bags that meet global law enforcement standards. Their products help investigators keep the chain of custody secure from start to finish — protecting truth, justice, and public trust.

Adsure Packaging Limited Seminar

Intelligent Security Tamper Evident Packaging Solutions

Intelligent Security Tamper Evident Packaging

Adsure Packaging Limited has taken part in the Security Document Summit (SDS) Seminar on October 17th-18th in Beijing National Conference Center.

Security Document Summit (SDS) Seminar-Adsure Packaging Limited

On October 18th,our colleague Olina have represent Adsure for the presentation .Our topic is to talked about how to identify the authenticity of food, cash and many aspects that may exist risk. Our presentation has caught many audiences’s attention.

Case 1–Food Delivery Security

For the food delivery security, there are news shows that the driver has eaten customer’s food because he is very hungry. And after that, they cover the lunch box and return the food to the customer.

Security Document Summit (SDS) Seminar-Adsure Packaging Limited

It seems it is very horrible. How to make sure your food is not opened by others? Adsure have provided the solution for the online food ordering. That is, using the food delivering tamper evident bags. It will be waterproof .And also protect the food from opening by others. More importantly, it can reduce risk if others put unknown item inside. it will also improve the reputation of online food ordering platform.

Food Delivery Security

Case 2—Cash-In-Transit Security

Another point Adsure have mentioned will be cash delivery security. There are news shown that one side door of Armored Cars opened and 3 cash box drop on the road when driving. And the deposit from the cash box fly away.At present, not all the money have fully collected .They have lost 62,000,000 Taiwan dollars.
It is really amazing case. According this situation, Adsure put forward a solution that uses the tamper evident bags for the deposit. It will also secure the cash delivery.

Cash In Transit Security

Since tamper evident bags is not well known for China Market. Adsure have also introduced the tamper evident bags more clearly. It may create a good way to promote and to improve people’s security awareness and to reduce more lost.
Adsure have also put forward a new solution. It is about how does RFID technology applied in the security packaging. And it may increase people’s confidence for the safety packaging.

standard-RFID-tags

RFID Technology for Cash Transfer Security

Although there are variety of solution for cash transfer security. People still worry about the safety of the cash.

They have used different of security level tamper evident bag, from lower level to high level, from Level 0 to level 4.

Level 0: This is the hot melt tape. When someone tries to use cold to open it and reclose it again, it will not leave any evidence.

Level 1: Strong adhesive with graphic distortion when tampered with.

Level 2: Strong adhesive with hidden message “VOID” appears when tampered with. If someone tries to use Freon instantly freeze the tape to -60F, it will show tampering evidence.

Level 3: Level 2 plus Water & Solvent Evident. If someone tries to use water or solvent to get into the bag, the “Tamper –Evident” word disappears!

Level 4: Level 3 plus Heat Evident .

level-4-security-bags-feature

They also used different material tamper evident bag, from common plastic material to non-woven material and Tyvek material.

However, they still look for higher level for cash transportation.

They thought someone may destroy the barcode on the bag and it will influence their track and trace of the cash transportation. They even worry about the readability of the barcode and these may cause inconvenience.

Nowadays, RFID technology may be a new way to solve their questions.
RFID Security bag with E-ticket system will increase users’ confidence.

When use the RFID Security bag, you can quickly scan multiple item together, it will save your time. The RFID Tag inside the security bag will not be destroying by others. It can enhance the security of cash in transit.

The Global unique number of the RFID Tag will provide high security.

All the information of RFID Tag will store in the database of the E-Ticket System. Only the security bag information store in the database can be used. Once used, it cannot reused again.

Automatic and Smart Packaging Bags

automatic packaging

Have you imagine new way for automatic packaging?

Packaging appears everywhere in our life. It has been an indispensable way for online shopping, retailers and so on.For online shopping, many online stores will use carton sealing tapes, packaging boxes, bubble mailers and poly mailers for their packaging.

Poly mailers do play an important role for shipping .Ecommerce and Courier Company normally put the shipping items into the poly mailer bags and seals it. And then put the waybill into the clear outer pouch or sticker the shipping label on to the mailing bags with courier information.

Will you think it is a good way for your packaging? Do you need to make your packaging more smart and quickly?

Automatic packaging-Auto Bag

Auto Bags, are also called Pre-opened bags, which is used on automatic baggers. Each bag is pre-opened on one side and has a slit in front and a perforated back between bags and slit-top openings for automatic machine or fast hand product loading.They are ideal for apparel,small parts,seed packaging.

auto bag for small parts

People just need to put the product inside and meanwhile the thermal printing on the bag directly and the auto packaging machine will heat seal the bag very quickly.

auto-packaging

This kind of packaging method will help many online stores and people who need auto packaging quickly.

And it will save their time and cost cause there is no self-adhesive tape and shipping label or waybill.

The auto bag can be customized on rolls or fan folded in a box. Fanfold auto bag will help you save the volume and then help you save the shipping cost. But not all automatic packaging machines are suitable for these two packaging style.

custom auto bagsFanfold Auto Bag

Some machine can match this two packaging while others just can use on rolls or fanfold in a box. It also depends on your automatic packaging machine.

If your company have a lot of goods for packaging and you want to save your time for packaging. Auto bag may be a good choice for you.

cash-in-transit

Tamper Evident Bags Applications

What’s Tamper Evident Bags For?

Tamper Evident Bags are used for different applications such as Banks,CIT Companies,Retail Chain Stores,Law Enforcement Departments,Casinos and so on.

Bank Deposit Tamper Evident Bags

Tamper Evident Bags are ideal for multiple applications.They need to secure deposit, personal property, confidential documents, forensic evidence, duty free shopping and so on.

Cash In Transit Security Bags

Banks, CIT Companies, Finance Industry, Retail Chain Stores , will use this tamper evident bag to secure their deposit during cash in transit.

They also call these tamper evident bag bank deposit bag, security money bags, and safe bags.

Security Bags for Retail Chain Stores

Law Enforcement Agencies like Ministry, Police, Customs, and Prison will use these tamper evident bags for forensic evidence or some sensitive documents.

Evidence Bags for Police Law Enforcement Agencies

Casinos will use these tamper evident bags for Casino chips.

Security Bag for Casino Poker Chips and Deposit

Election will use these tamper proof bags for voting booths, polling location and poll workers.

With convenient and secure solutions for protecting election ballot, cards, data and supplies during storage and transport.

Education departments will use it to secure the sample papers, test papers and question papers during storage and transport for National Examination.

Security Bags for Education Departments and Examination Question Paper

Each bag is tamper evident. When someone tries to take out the item inside by improper way, it will show tamper evidence.

No one can take out the item without any evidence.

Normally, every tamper evident bags will have barcode and serial number for track and trace.

It can also customized with white write-on Information Panel, multiple tear-off receipt, tamper evident level, multiple compartments.

It also can print with your brand name and your design.

Security bank deposit Bagscustom tamper evident bags

For tamper evident level, it all depends on your item value and your budget.

If your item value is very high and you need high tamper evident level.

We can help you with it. Normally, level 4 tamper evident closure will be the higher level to secure your item.

However, the level 4 tamper evident closure with RFID tag will the highest on at this moment.

rfid technology

duty-free-airport-cigar-shops-stebs

Why Should Some Airport Duty Free Stores Use ICAO STEBs?

ICAO STEBs For Airport Duty Free Stores

ICAO STEBs also called security tamper evident bags. They are ideal for all airlines and airport duty free stores. Each bag will have single handle for easier carry and inner pouch for receipt.

duty-free-airport-cigar-shops-stebs

Each ICAO STEBs Bags will have State/Manufacture Code and should be printed with ICAO logo.

Retailers will use the inventory code to manage the retailer’s inventory to ensure that no one steal and mishandle the no empty STEBs.

Scan the inventory code during the sale to carefully manage the STEBs inventory in the store.

icao stebs

To ensure proper security control of the supply chain processes, retailers will use safety equipment. In order to keep all options open, you can choose unique numbers, two-dimensional barcodes, RFID chips, and so on.

Only a listed of manufacturers of International Civil Aviation Organization (ICAO) are able to provide for International Airport and Duty Free Shops.

So why airport duty free stores use STEBs?

The ICAO STEBs are designed to secure LAGs (Liquids, Aerosols & Gels) purchased at airport duty free stores.

To prevent departing passengers bring threaten liquid from making devastating consequences.

Customers who buy from duty free store cannot open the ICAO STEBs bag until final destination.

If someone tamper the bag ,the custom may confiscate the contents.

If someone has tried to tamper with the bag to remove the contents, it will show tamper evidence.

The current ICAO guidelines on security controls for LAGs are effective in mitigating the threat posed by liquid explosives.

And should remain in effect and universally implemented by all Member States until effective, efficient and widely adoptable detection technology becomes available that will facilitate the gradual replacement of the current restrictions.

 

ADSURE SECURITY BAG FOR CASH

How to secure your cash during cash in transit?

What Is Security Bags?

Security bag is also called Safe Bags ,Tamper Evident Bags,Bank Deposit Bags.

Therefore, They are very important for Banks, Armored car company , retail chain stores.

Bank deposit bags are ideal for coin,money,deposit security during the cash in transit.  No one can open it without any evidence.

Each Security Bags will have unique barcode and serial number for track and trace.White Write-On information Panel for users to write the vital information catagories. They are all tamper evident.

level 4 security deposit bags

Security Bag will have six tamper evident level,from level 0 to level 5.Lecel 5 also called RFID security bag..Level 2 and Level 4 will be the common tamper evident level for many banks, CIT Companies, Retail chain stores.

The RFID SECURITY BAG will have the highest tamper evident level.You can choose the suitable tamper evident level.It all depends on your security packaging demand and cost.

Many brand can also customized own security deposit bags with brand names to increase brand awareness.CIT Company,Retail Chain Store,Banks,Casino normally will do custom security deposit bag with their brand name and logo.Even with their own design.

What’s the differnce between level 2 and level 4 tamper evident level?

Level 2 tamper evident level:When someone try to open the bank deposit bags in the normal tamperature or extremely cold tamperature,the hidden message “VOID”appears.

level 2 tamper evident bags

Level 4 tamper evident level:It contains all the feature of level 2 tamper evident tape.However,it is higher than it.When someone try to use water and solvent to open the bag,the “Tamper-Evident” word is disappeared.And when somone try to tamper the bag with extreme heat to get into the bag,the red word “VOID” will show up on the tape.

level 4 tamper evident bags

How to use security bags properly?

Step One: check bag to make sure there are no tears, cuts or any other signs of tampering.

Step Two: write the relevant information onto the white panel on the body of the bag and receipt.

Step Three: Tear the receipt.

Step Four: insert the contents into the security bag.

Step five: lift the tape, remove release liner and expose the adhesive.

Step six: press down seal starting from center, and moving outwards. This ensures that the seal is secure, by leaving no air pockets.

Step seven:  when receiving bag, check to make sure there are no tears, cuts or any other signs of tampering.

ICAO STEBs for Duty Free Shopping

Security Tamper Evident Bags STEBs Bags

ICAO STEBs for Duty Free Shopping

ICAO STEBs for Duty Free Shopping

If you are traveling internationally, and you wish to make a duty-free purchase of liquor, perfume, cosmetics, or any other item that may contain liquids, gels, or aerosols, you should take extra precautions to ensure that your items will not be confiscated by security in the US or elsewhere. These suggestions apply only to those items in containers that are larger than 100ml (3.4 fluid ounces) because only larger containers are subject to many of the common restrictions on liquids and gels. Categories of duty-free items that fall under these restrictions include the following:

Liquor
Wine
Perfume and body sprays
Facial cleansers and creams
Body or hand lotions
Liquid make-up
Member countries of the European Union; as well as Iceland, Norway, Japan, Singapore, Australia, and others; have restrictions on liquid and gel products that are similar to the US restrictions regarding liquids and gels in carry-on bags. As a result, there are potential implications for passengers who purchase liquid duty-free items (e.g. perfume and liquor) while traveling to and from international destinations.

Because many duty-free shops in other countries are located before the security checkpoint, all liquid duty-free items purchased in those airports will be placed in special sealed tamper-evident bags in order to be permitted through those countries’ security checkpoints. Note that the tamper-evident bag is not currently accepted through US checkpoints, but there are other options listed described below that may help you.

To avoid getting your liquid duty-free items taken by airport security, please follow the guidelines below.

Traveling from the United States
Duty-free purchases of liquids of any size from shops in the US are permitted if you have a nonstop flight to an international destination.

If you have a connecting flight in Europe, Japan or another international destination, US duty-free liquid purchases in containers larger than three ounces will not be permitted through security checkpoints because they will not be in the an ICAO approved tamper-evident bag. However, many duty-free stores in US airports offer the approved tamper-resistant. If this is the case, make sure that the duty-free shop places your items it in the bag in the store.

While using tamper-evident bags may work for you in most situations, perhaps the best way to make sure to avoid any problems at the checkpoint is to wait until you reach your destination to purchase your duty-free items containing liquids, gels, or aerosols. Keep in mind that this option may not exist for every airport, so check ahead of time.

When traveling to an international destination with a connection, it is best to buy your duty-free items on the last leg of your trip when you do not need to pass through any more security checkpoints.

Note on Japan: Japan does not use or accept the ICAO tamper-evident duty-free bag, so travelers changing planes in Japan for other international destinations should wait to purchase any liquid, aerosol or gel duty-free items in excess of 3.4 ounces (100ml) after arriving in Japan. Passengers who have liquid duty-free items in containers larger than 3.4 ounces will not be allowed to take them through the checkpoint during the security re-check process in Japan.

Returning to the United States
On nonstop flights bound for the US, passengers carrying duty-free liquids purchased at an international airport will not have any problems.

On nonstop flights bound for the US, duty-free liquids purchased in an international airport will be permitted through the checkpoint only if they meet US requirements for the use of tamper-evident bags. Duty-free delivered to the aircraft for passenger pick-up, bought on the plane or purchased after the security checkpoint are allowed.

If you are flying to the US and have a connecting domestic flight, you will be required to reclaim your checked bags prior to passing through customs inspection, so use this opportunity to place your duty-free liquids, aerosols, and gels in your checked bags before rechecking them for your connecting flight.

Other Duty Free Advice
When traveling to an international destination with a connection, buy your duty-free liquid items on the last leg of your trip.

In Europe and other countries that use the tamper-evident bag, passengers should not open the bag before the security checkpoint, or else the duty-free contents may be seized.

When returning from an international destination on a connecting flight in the US, use your time in customs to place any duty-free liquid items in your checked bags.

TSA advice on duty-free items
If you are arriving in the US and have to connect with another flight, you have to pass through TSA security before you board your next flight. This means that any larger duty free liquid, gel, cream, or aerosol item (more than 3.4 ounces or 100 ml) that you have in your carry-on bag may have to be discarded unless you have taken the proper precautions.

TSA advises that you can carry these items onto your next flight if under the following conditions:

The items are are in transparent containers.
They were purchased in a duty-free shop.
The store packed them in a secure, tamper-evident bag.
If this is not the case, you should plan on placing your duty-free item in a checked bag before departure, or during your initial arrival in the US when your baggage is being processed by the customs authorities (who are separate from TSA).

In Europe and other countries that use the tamper-evident bag, passengers should not open the bag before the security checkpoint, or else the duty-free contents may be seized.

custom poly mailers

Foil Hot Stamping on the Poly Mailers

As a result of continuous improvement of production technology, we now have  bronzing technology applied to the Polyethylene and Tyvek material, which is a great breakthrough for our company.

Make any package uniquely your own by adding your logo and creating brand awareness. Our in-house hot-stamping facilities ensure quick turn-around and highest quality.

Hot stamping is used for post printing, meaning the hot foil stamping poly mailing bags and hot foil stamping tyvek mailing bag are already made and the foil is “stamped” onto the bag. Now we can make Metallic gold & metallic silver on your mailing bags.  Please email us at:Sales01@AdsurePackaging.com

Artwork Guidelines

If you need custom hot stamping foil printing mailers, please send your artworks directly. All artwork should be supplied in Adobe Illustrator .AI, .EPS, or .PDF format, vector outlined. All files should be emailed to:Sales01@AdsurePackaging.com