If the sender is determining the amount being sent, all they have to do is specify an amount and scan your public key’s QR code, as displayed on the Receive screen.
PaperVault also enables you to generate a Payment Request QR code to request a specific amount of cash or bitcoin/ether/etc. To do so:
1. Select Receive at the bottom left of the PaperVault App.
2. Share a Payment Request by Email or Text Message.
3. You may also select whether you want the amount to be in the currency type or the default fiat currency of your choice.
4. Enter the requested amount into the text field.
5. Select Generate.