100Pcs 6"x9" Clear Plastic Bank Deposit Bag - Tamper Evident Security Bags -Transparent Cash Money Bags with High Level Security Seal

I've never used these before, so here is how they work:- Peel off the white sticky backing and carefully ease the seal flat like you would close a zip lock bag. Wrinkles will be prominent and you may leave large air holes if you aren't careful with this step. Sealing it from the middle and outward to both ends worked well for me- There is a tear off tab at the top of the bag that acts as a receipt- Each bag is unique in its serial number- The bag is very durable. I wrinkled, balled, stretched and tugged with an item inside and it wasn't that easy to puncture it accidentally. This can give you a good idea of whether or not damage or tampering was intentional or if the item was severely mishandled.- It can hold a hard drive, keys, documents or anything else besides cash that you want some assurance wasn't tampered with or "accessed" when out of your possession. It's not very useful for frequently accessed things though as that would be wasteful- A good use case is if you give someone you kind of trust a spare key to something. Wrap the key so it can't be seen, seal it in the bag, and give it to a person. You can then confirm that unless an emergency occurred, the person didn't duplicate your key or use it, unless they X-ray the thing- The pink heat strip activated near a 1200W space heater after some time, and well before the plastic was at risk of melting- The water tamper dissolves the text if exposed from the inside with water- Although it was difficult to open from the top, ripping it open leaves VOID text

These are your typical plastic one time use deposit bags for making night deposits to your bank. They are smaller then normal night deposit bags, but being 6x9 there is still plenty of room for cash / checks / coin in them. There are several fields on the front of the bag to put your company name, account number, amounts, dates, etc on the bag. They have a tear off "receipt" that contains the bag number should you need to reach out to your bank. Overall a good purchase and will purchase again when in the market.