The companies I've worked for have always had a very robust security program when it came to contractor building access.  Those security programs usually went hand-in-hand with my contract templates, which contain a provision that requires the supplier (and its staff) to comply with company policies and procedures:

1.1.              Compliance With Laws; Customer Policies and Procedures.  Both parties agree to comply with all applicable federal, state, and local laws, executive orders and regulations issued, where applicable.  Supplier shall comply with Customer policies and procedures where the same are posted, conveyed, or otherwise made available to Supplier.  Without limiting Supplier’s other obligations of indemnification herein, Supplier shall defend, indemnify, and hold Customer Indemnitees harmless from and against any and all Claims, including reasonable expenses suffered by, accrued against, or charged to or recoverable from any Customer Indemnitee, on account of the failure of Supplier to perform its obligations imposed herein.

This is great, and probably enough, but I've always thought that there needed to be something more for supplier employees (i.e., "contractors).  While I don't want to conflict with any of the provisions contained in my agreements with the suppliers and while I don't want to create any co-employment issues, I really think that a link between company policy, the supplier contract, and the supplier's staff is nice, additional peace of mind.

Recently, my department and my building operations group worked together to create a badge request form for contractors expected to be on-site at my company's facilities greater than three days.  As a request form for badges and building access, it's pretty typical, but what is semi-unique are the acknowledgments by the individual contractor.  We scoured the Internet and cobbled together the best of what we could find, and we're pretty pleased with the results.  No push-back from internal customers or contractors, which is a plus.  You can find the form attached here.  Feel free to use or let me know if you think it can be made better (but kept to one page).