How to get authorization of $X amount, but a charge a customer 10% first then 90% later on?

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I want to be able to do this:


On the 1st day I’d charge a customer, say, $10, for a product and it's a fraction of the full price.


In, say, 7 days, and only if a certain condition becomes true, I want to charge him $90 more and by myself, without any addtional permission or action of a customer, and with certainty. Meaning, a credit card has to permit this action and amount right on the 1st day.


How can I do it? What API endpoints should I use? I’m a developer, I’m fine with programming it.



A customer will be notified about this scheme upfront.