Flexible Payment

Does Wix payment allow flexible payment? For example, today, one of my customers needs to pay me $500, and another customer needs to pay me $400. So the customer goes to your web page, click on pay now enter $400 or $500 or any amount requested from him and pay it.
Would you please let me know?

You can do this through WixForms using a payment form with multiple payment options your client can select their payment amount and pay that was or you can do it through Invoices.