FR Tech, please note this new requirement coming from VI and MC in April 2020 where merchants will have to support authorizations on refunds. I am presently tracking down specs for this change so we can scope the work, but wanted to get this on your radar given the specified date for compliance is April 2020.
Visa and Mastercard changes processing Refunds:
Authorization required on Refunds (Visa and Mastercard)
Visa and Mastercard will require, from April 2020 onwards, all Refund Transactions to be authorized, effectively applying the current Fee for Purchases on Refunds as well.