Preface

This Document

This document, the PayPal Website Payments Standard Checkout Integration Guide, which 

describes how to use and integrate PayPal features for merchants, replaces the PayPal 

Merchant User Manual and Integration Guide, issued in June, 2005.

Intended Audience

This document is written for merchants whose websites use PayPal features to obtain 

payments from PayPal members.

Notational Conventions

This document uses typefaces to identify the characteristics of text. These typefaces and the 

characteristics they imply are described below: 

Typeface

How Used

serif italics

A document title. 

A term being discussed or defined. 

For example: A file is a readable or writable stream of characters  

Boolean values (not keywords). 

For example: The function returns true if it encounters an error. 

monospaced

  Pathnames or file names that appear in body text frames.

Code related names that appear in body text frames. Such names are used for 

functions, callbacks, arguments, data structures, and fields. 

For example: AbstractResponseType is the SOAP response type definition on 

which all PayPal API response methods are based. 

Components of Internet protocol requests and responses, such as HTTPS and 

FORM variables.

For example: The PayPal system uses a method=POST request to return IPN 

status variables related to subscriptions, such as txn_type.

Serif bold

User interface names, such as window names or menu selections.

For example: On the Profile page, click Email to confirm your email address. 

Website Payments Standard Checkout Integration Guide

August, 2005

13