Please follow the steps in the “Working with Visa APIs” link below to register and create a Visa Developer application.
This guide walks you through the key steps for application creation, credentials, and connection validation.
If you are ready after testing your App in sandbox, send us a production request and we will evaluate your Application and other credentials.
For information on VisaNet, please navigate to the link below.
To what I know is that IAT number is assigned to the billing entity. Let’s say if you have to wire the money into someone’s account, the billing company should give you the information like Account number and IAT number. I can’t be very sure on this but usually this is what I have seen.
Since we are a developer platform, not a financial institution, I would recommend you do some research online or follow up with the issuing banks in obtaining the IAT Number.
However, I will continue to research within and will update you if I find any information.