As @Concorde stated, not all shippers and receivers will require a seal on your trailer but many do. I pulled a van for a few months and a reefer for about a year and I had a spot on my bill of lading to put my own personal seal number and a place for shipping/receiving to sign for seal verification. I made it a personal policy to install a seal when it was not required and I did it to protect myself if there was ever a question about the load or it's contents.
For security yes... but i do auto parts and almost never use a seal.. If the shipper doesn't give me one o well.. But then again company policy is to always seal a loaded trail
I always carried seals and sealed all my trailers. got them from the terminal warehouse guys. empty ones had a broken one dropped through the holes to keep the handles from bouncing open, yes had that happen.
Anytime I'm pulling a loaded trailer. If I'm not given a seal. I put my padlock on it. Because to me a unsealed load is just asking for something to happen. No matter what your hauling
You learn this real quick in south Tejas even with a seal to padlock. Things that get you time in the federal pen can mysteriously end up inside your box.
Wrong. Hazmat loads, pharmaceuticals and food grade loads have to be sealed per regulations. The DOT, FDA and USDA all have regulations.