USPACKSMART 100% Tamper Evident Security Stickers - Labels - Seals (Blue, 2.5 x 8.5 cm), Sequential Numbers, Writeable in 100 Units, Fan Folded (Ref. LB-8348)

No trouble with this product. Ready to use when it arrived. Works as expected. No concerns.

Review: Blue Non-Transfer Tamper-Evident Security Void Stickers When you have sensitive equipment to shop, often you need to indicate to the recipient that the box or case hasn't been opened while in transit, and these seals are for just such a use. In my avocation, I fly drones for the US Government (not the cool big ones with Hellfire missiles, but the smaller, friendlier ones that have infrared cameras for finding lost hikers and downed aircraft). Sometimes, I have to ship or transport these drones around the country, and when I do, I need a method to seal the case. These stickers are an effective, economical method for ensuring that if the case is opened during transit, the recipient will know immediately upon receipt. They stick to ABS plastic cases quite nicely. They also stick to the polypropylene used for evidence bags, sandwich bags (for the fridge), paper envelopes, shipping boxes, and The trick is that parts of the stickers adhere better than others, and the very sticky parts spell out words like "OPEN," "SECURE," and "TAMPER," when you peel off the sticker. The stickers are bright blue (I haven't checked to see whether they fluoresce, but it wouldn't surprise me). Once they're attached, you can't really move them without making a serious mess of the label and its uniform blue color. The labels have a location for your signature and the date (Pro Tip: Sign and date them before you use them to seal a package - afterward, your writing may be very messy). That information is on the surface, so even if the seal is tampered with, the original seal signature and date are legible. Summary: These are great for putting a "proof of non-tampering" on equipment cases, suitcases, evidence bags, envelopes, crates, and the like. They are priced reasonably, and do a great job of ensuring that your shipment/letter/evidence hasn't been tampered with since it was sealed. They do a great job at what they're designed for. 5 Stars.

Doesn't stick well

We ordered these because we resell items found in storage units including electronics. To avoid falsified returns and scams where buyers take parts that they need from a working unit and then submit a return, these came into play. They work exactly as intended. Once applied it’s immediately obvious if they’ve been tampered with. The adhesive sticks well to the plastic housing around all kinds of electronics. The void transfer shows clearly when removed and I like that they’re sequential numbered and rideable, which helps with tracking. The size is practical without being bulky, and the pack comes with quite a bit, making them a good value for and worth using on electronic items sales.

I use this on packages to see if they are tampered with. The size of the stickers is perfect for your everyday package. I like the bright blue color. And that there are numbers on each sticker, in order. I find them very easy to apply. And they stay on, even with a lot of package movement. Great quality. Never had one rip. Never had one fall off. They work well. So it's a good value.