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To improve and streamline your support experience, we've:

  • Moved our technical support content from www.paypal-knowledge.com to the PayPal Help Center.
  • Moved our technical microsites to www.paypal-notice.com.

Technical Support Content
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Merchant Security Roadmap
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Most popular Technical Support Articles
Where can I find test credit card numbers?  
What are the IP addresses for Payflow servers?  
How do I create a discount code or coupon code for my PayPal buttons?  
What is PayPal Invoicing and how does it work?  
How do I issue a credit (refund) to a customer?  
What is the Payouts API and how do I enable it on my account?  
How do I integrate Payflow Pro with Magento Community Edition  
How do I edit the information in my PayPal Payments Standard buttons?  
How do I view emails sent to my Sandbox account?  
How do I whitelist my server’s IP address so it can access PayPal APIs?