If so, why?
Yes, they can. Seals allow you to check a container's integrity more often with less manpower, because seals can be read automatically as containers are loaded from and unloaded onto a ship, train or truck, or as they pass through a portal. Keeping a closer eye on containers discourages thieves from trying to break into containers. Here are some articles we've written about container seals:
I hope the above prove useful to you.
—Mark Roberti, Founder and Editor, RFID Journal