PayPal/integration
		
		
		
		
		
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Overview
This page is about integrating PayPal with web sites.
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Different methods of conducting a transaction, from simplest to most advanced:
| Method | where it happens | when the payment info returns | connection | 
|---|---|---|---|
| PDT | PayPal's site | when customer returns to merchant site | Customer's browser → Merchant's server | 
| IPN | PayPal's site | immediately after the transaction | PayPal's server → Merchant's server | 
| NVP | Merchant's site | in response to merchant's server | Merchant's server → PayPal's server | 
Links
Notes
The "custom" field never shows up anywhere for me, even in Instant Payment Notification. Still trying to figure out what's wrong. --Woozle 18:23, 2 January 2009 (EST)