Inquire about the service provider's normal policies on credit and payment of charges. Inquire whether the provider will offer a discount if the bill is paid within a certain number of days. Specify in the agreement or on the purchase order what is not allowable for direct billing, i.e., personal phone calls, alcoholic beverages, movies, room service, etc. When payment is made by University check, the UW System is exempt from payments of Wisconsin state and local taxes for meals and lodging under exemption number ES-40706 issued by the Wisconsin Department of Revenue. Taxes imposed by other states sometimes also may be avoided. To determine whether the UW System has an exemption certificate for the state in which your event is being held, refer to Appendix I of the UW System Travel Regulations.