Due to security and PCI compliance concerns, Authorize.net can only import PGP encrypted CSV files. Any other file type cannot be imported by Auth.net.
Authorize.net runs imports on Wednesday and Fridays.
You will need to first initiate this process with your existing Provider, as they will need to export your data. They will then need to send us an email with information regarding your export, and we will process the import request on the next available date.
NOTE: You MUST have the Customer Information Manager (CIM) feature enabled, or else the import will fail.
Lastly, please reach out to our Customer Support team as they will need to open an import case on your behalf. You will be asked to provide the best email address on where we can send your import results to.