Merchant Category Code 6012 is for online payments from Financial Institutions. It's got a history of fraud, especially in the UK. So payments from companies in this category must include additional fields for fraud purposes.
If your payments fall into this category, then you can use the Connect simulator to test these extra field and to get your requests to meet the minimum requirements for go-live.
Get going with MCC 6012 in the Playground:
First, code your initial Connect requests to include the following additional parameters:
Your requests need to include the following additional parameters in the initial Connect request:
Finally, start firing Connect requests from your local dev environment to the Connect simulator. All requests will be treated as a MCC 6012 transaction. If you fail to send in the required MCC fields, you will see a validation error from the Simulator with information about the missing details.
Learn how to test your systems with Dynamic Currency Conversion enabled.