General Documentation
Back Office User's Guide
Standalone Recurring Billing
Using WinSCP

Web Services Integration Documentation & APIs 1.0 (Direct Debit and Credit Cards)
WebServices API
Error Troubleshooting Guide for Credit Cards
Recurring Billing API

Web Services WSDLs and Links 1.0 (Direct Debit and Credit Cards)
Direct Debit WSDL: https://webservices.optimalpayments.com/directdebitWS/DirectDebitService/v1?wsdl
Direct Debit Web Service: https://webservices.optimalpayments.com/directdebitWS/DirectDebitService/v1
Direct Debit HTTP Post: https://webservices.optimalpayments.com/directdebitWS/DirectDebitServlet/v1
Credit Card WSDL: https://webservices.optimalpayments.com/creditcardWS/CreditCardService/v1?wsdl
Credit Card Web Service: https://webservices.optimalpayments.com/creditcardWS/CreditCardService/v1
Credit Card HTTP Post: https://webservices.optimalpayments.com/creditcardWS/CreditCardServlet/v1

Secure Payment Page
URL Static Payment Link Generator
Static Payment Link Guide
Dynamic Payment Link Guide

Risk Information
Risk Management Tips
Chargeback Prevention
Fraud Prevention

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