I have customers who need to pay ahead of time one lump sum for multiple future services

[Peakhealthgroup]

Large quarterly payments by a customer need to be applied to future purchases as needed.  How do I best do this with the current capabilities of the platform?

[JK_Fiber_Art]

Since Square is not a one size fits all transaction processor however, there are a few options.   One option is to have what you have in mind custom programmed by a Developer.  Another is Square's Prepayment for Appointments.  Then there's Square's Gift Cards - they have both physical and eGift versions.  And it's possible there's a 3rd party service out there that has everything or almost everything you need.  Each suggestion has pros and cons - depending on your budget or if you just want to keep things simple.