Invoices and payroll documents must be approved by the Principal Investigator, department chair, or other persons authorized in writing by the Principal Investigator. A memo delegating signature authority must be on file at the unit level where sponsored project administrative/budget responsibility resides (see GIM 2 on OSP's website). 

Persons approving expenses to charge sponsored program budgets should have first-hand knowledge that the expense is allowable, and how the expense benefits the sponsored project.  If the expense is being charged to more than one budget it must have documentation to explain the basis used to determine the allocated amount.  If the individual processing the payment does not have first-hand knowledge, they should have documentation from someone with first-hand knowledge of the allowability and benefit to the project.