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I want to make a web application were people are paying money (for example through mastercard/visa/paypal etc.).

My question is: can it someh开发者_开发百科ow be made that the money transfers are made only after a longer period when a condition is met in my web application.

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Yes.

What's your real question?

You have a multi-step workflow with money changing hands after many steps. That's pretty standard for all shopping-basket sites.