When you use InvoiceASAP, you have multiple options for processing customer payments. The payment options available are currently: Paypal Here, Square, WePay, Paypal, and connecting your Merchant Account.
1. Login to the InvoiceASAP Manage Account website (www.invoiceasap.com > Login)
2. Click on Settings.
3. Click on Payment Methods.
4. If you already have a Payment Method then you will see this screen. Click the "+" Sign to add another payment method.
5. Select a payment method.
Sign in with your payment method credentials.