Existing Suppliers
Need to update information or have a question? We’re here for you. Select the appropriate option below.
Invoice Inquiries
If you have a question about an open invoice, outstanding payment, or need to submit a W-9, start here.
Banking Changes
Need to make a change to your company banking information? No problem. We'll walk you through the steps.
Supplier Questions
Have a question about doing business with us not related to registration or payment? Feel free to ask.
Looking to Start Doing Business with AEP?
We recognize that a strong, diverse supplier community is essential to economic vitality and look to conduct business with competitive, diverse suppliers. Take the first step by registering through our Ariba system.