RBS WorldPay Atlanta: Level II and Level III Transaction Requirements When you send a capture request with Level II and Level III data, you must include the required fields for every capture request. For credit requests, RBS WorldPay Atlanta does not require you to indicate the request is for Level II or Level III processing. For information about the non-Level-II and non-Level-III fields required for capture and credit requests, see the Credit Card Services User Guide. Interchange Rates This document provides guidelines that indicate which fields are needed in order to obtain the best interchange rates. These guidelines are based on industry information. CyberSource recommends that you contact your acquirer for the most current information because the payment card companies can change their requirements at any time. Data Types Fields for amounts and tax rates use a string data type. However, you should include only numbers and a decimal point in those fields. Processor Specification The specification that CyberSource used to implement Level III processing for RBS WorldPay Atlanta is RBS Worldpay API message specification, version 7.1.0, June 2, 2009.