Hello, @tgifol, you should have the capability to generate an invoice with itemized details and establish a standard due date. However, within the invoice notes, please mention the specific amount required for the down payment and emphasize that it should be paid immediately.
Once the invoice is ready, proceed to send it. Upon receiving the invoice, your clients can make the payment through Stripe, where they will have the option to manually enter the down payment amount.
A confirmation email will be sent to them, indicating that a partial payment has been received for invoice number XXX.