Getting Started with Merchant Accounts and Payment Processing

Start here to learn how payment processing works and then get instructions for setting up online payment processing in your store. Learn about signing up for or setting up a merchant account.

PayPal Payment Processing

Learn about signing up for and setting up PayPal as a payment processing option. Get instructions for capturing funds, voiding transactions, refunding transactions, and more.

Processing Credit Card Orders

Get instructions for viewing, processing, and modifying credit card orders. Learn how to process credit card orders online, offline, or by manual transaction. Learn how to void sales, issue credits, and submit and review batches.

Retrieving Orders

Learn about retrieving orders by email, or real-time delivery. Also learn about order tracking and exporting orders in various formats.

Order and Payment APIs

Find out how to add partners to your store's API access list and manage partner tokens, and download reference and implementation documentation.

AcceptPay®

Learn about the online invoicing and payment solution from American Express OPEN designed for business owners, and how you can use it with your Yahoo! store.