tack seal
Computing term for a type of seal or sticker used for tamper-evident or security purposes, often in packaging or hardware.
この機器にはタックシールが貼ってあるので、開封されたかどうかすぐわかる。
This device has a tack seal on it, so you can tell right away if it has been opened.
Loanword from English 'tack seal', likely a compound of 'tack' (as in adhesive) and 'seal'.