Thank you for reaching out on this.
So that we can better assist you with this. Do you mind clarifying what do you mean by payment receipt, please? Is this a payment you made to your supplier or is this a payment you received from your customer?
Thank you and look forward to hearing from you.
I might have something that will work for you, danny-towie-com.
Currently, we can capture your customer's signature only when you're using the QuickBooks Online app. Here's a link for reference: Capture signatures using the QuickBooks Online app.
Aside from that, you can also look for a third-party app for e-signatures that can integrate with QuickBooks Online.
Let us know how this goes so we can provide the help you need. Have a great day!