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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.

Ask about an invoice

Banking Changes

Need to make a change to your company banking information? No problem. We'll walk you through the steps.

Update your info

Supplier Questions

Have a question about doing business with us not related to registration or payment? Feel free to ask.

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CAA Inquiries

If you have a question or issue with CAA, start here to get assistance.

Ask about CAA

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.

Register today

For questions or further support, contact AEP's Supply Chain Solution Center at 833-493-0821.