"Minik" (also known as "Minic") is an abbreviation for "micro-deposit" or "mini-deposit".
Typically, these are 2 small amounts (around $1 each) that are first debited and then refunded by a payment system (such as PayPal) to successfully link a BA or card (the correct value must be entered in the payment system account or app for verification).
Miniks can be viewed on your card statement in your bank account or online card account (Enroll).
You can also check them using some specialized services.
