Integration Guide

Contents

Getting Started with PayPal .................................................................................... 3

What is Express Checkout? .................................................................................. 3

How Express Checkout Works .............................................................................. 3

Designing an Optimal Checkout Flow .................................................................... 5

Integration Use Cases ............................................................................................ 9

Obtaining an Express Checkout Button and PayPal Mark .......................................... 9

Use case 1: A Sale transaction ........................................................................... 10

Use case 2: Auth / Capture ............................................................................... 14

Use Case 3: Refunds / Voids .............................................................................. 15

Managing Response Codes ................................................................................ 16

Testing Your Integration ................................................................................... 16

Going Live With Your Express Checkout Integration .............................................. 17

Sample Code ...................................................................................................... 17

Which interface am I using? .............................................................................. 17

Express Checkout Sample Code ......................................................................... 18

Documentation ................................................................................................... 18

Online references (in English) ............................................................................ 18