The problem with final delivery over chat
A client may approve a launch in Slack, ask for one more tweak by email, pay from a separate invoice link, and request credentials in another thread. That makes final payment follow-up hard to reference.
Approval
Ask the client to confirm that the delivered work is accepted or list required changes.
Payment
Show the final balance and the external payment method you already use.
Release
Keep final credentials or files tied to your payment review process.
Use HandoffPay as the closeout layer
HandoffPay does not replace GitHub, hosting, Stripe, PayPal, Wise, or your invoice tool. It gives the client one clear page for the handoff decision and gives you a record for polite follow-up.
Close the development project with one handoff link.
Create a client page for approval, final balance acknowledgement, payment links, and release notes.