We use SAP Ariba as our invoice portal of choice, and suppliers providing services and materials to APA are required to use it.
The Ariba Network allows suppliers to track their invoices during the approval process, receive status updates through the system and e-mail notifications. Since many of these technologies may be new to our suppliers, there are automated, self-service help tutorials and documentation available to increase supplier proficiencies. Ariba offers a tiered subscription model to its customers. The lowest tier is offered at no cost to the subscriber.
US Suppliers
North Sea Suppliers