Signature authority is a particular audit point for CPSR Teams. Here are factors evaluated by the team as they perform your review:
Policies, Procedure and Documentation: You'll need a policy that clearly states he procurement has the sole authority to commit the company to performance. THIS INCLUDES THE SOLE AUTHORITY TO PROCESS A PROCUREMENT ACTIVITY (more below). You must also maintain and provide (during your data call) a signature matrix that shows thresholds for approval by title/level.