You can send the payment invoice link to your customers by following below mentioned steps

1. Login into your Merchant Dashboard
2. Click on "Payment Invoices" under "Accept Payments".
3. Click on "Create your Invoice", then enter bill description and customer details.
4. You can select Detailed Bill or Quick Bill as per your requirements
5. Click on Create Invoice to create the bill
6. You will see the Invoice link and sharing options (SMS, EMAIL, SOCIAL SITES, etc.) on the right-hand side