Absolutely! Find out when the truck is due, and have the manpower available to help unload, then check for damaged items as they come off the truck (hint: digital camera or camera-phone), count everything twice, and make sure your butt is covered before you sign on the dotted line. Remember, you are signing a legal document, not stating "Yea, I was there that day and helped unload...." Your signature means it's now your responsibility and liability. Don't get the idea the driver will just unload everything and you'll check things out later next week when you have a chance. If that's how you operate, you're not going to find any damage or shortages until 6 months from now, and by then it'll be 1. too late and 2. you pay.