IPpay is a Splynx add-on which allows refilling of customer balance and paying invoices via the IPpay payment gateway - https://www.ippay.com/.
IPpay contact details:
Marcus Clark - Senior Account Manager
Tel: 404-808-7250
The add-on can work with different credit cards and bank accounts, if cards or bank accounts are saved in customer profiles, the add-on allows you to charge all customers using Direct debit orders.
¶ Add-on installation
The add-on can be installed in two methods, via the CLI or the Web UI of your Splynx server
To install the IPpay add-on via CLI, the following commands can be used:
apt-get update
apt-get install splynx-ippay
To install it via the Web UI:
Navigate to Config → Integrations → Add-ons:
Locate or search for the splynx-ippay add-on and click on the Install icon in the Actions column:
Click on the OK, confirm button to begin the installation process:
¶ Add-on settings
After the installation process has completed, you have to configure add-on, navigate to Config → Integrations → Modules list:
Locate or search for the splynx-ippay add-on and click on the
(Edit) icon in the Actions column:
Terminal ID can be obtained from your Ippay account.
¶ Invoice payment
Once the configuration has been completed, customers can add a credit card or bank account on the Portal in Finance → IpPay payment credentials:
Now customers can pay for their invoices using the IPpay system in Finance → Invoices on the Portal:
Moreover, if one or both payment methods are added by the customer, the administrator can pay the invoices directly from customer's profile:
If everything goes well, you will see the status of invoice marked as Paid (on the customer and admin portal):
On the customer Portal Dashboard, customers can also see the list of non-paid invoices in Ippay widget (entry point) and the same-name buttons to pay such invoices.
The configuration of add-on Entry points can be found in Config → Integrations → Modules list, near the splynx_ippay_addon module item in Actions column, click on the 
(Edit entry points) icon. More information about Modules list can be found here.
To refill balances, customers can use the following link - https://<splynx_domain_address>/ippay, where they have to choose the Account type, enter the Amount of payment and click on Add button:
Additionally, you can charge all customers using one button, navigate to Finance → Invoices, set the period and click on Charge button as depicted below:
¶ Direct payments
Using the payments links is the simplest way to accept payments made with credit card or bank account. This feature is available in the IPpay add-on to pay Invoices and Proforma Invoices. This provides convenience and simplicity for your customers, so the amount of on-time payments will increase. For example, you can add a payment link to the e-mail with the (proforma) invoice, as a result, the customer can make payment quickly by clicking onto such link instead of logging in to their Portal page. In case the customer has saved the payment credentials on the Portal, they do not need to add further details when using the direct payment link in the future. If the credit card in not linked on the Portal, the payment details need to be entered each time the payment link is used.
To create a direct payment link, please use the patterns below:
To pay the Invoice:
by invoice ID
https://<splynx_domain_address>/ippay/direct-pay-invoice-by-id?item_id=<Invoice_id>
by invoice number
https://<splynx_domain_address>/ippay/direct-pay-invoice?item_id=<Invoice_number>
To pay the Proforma Invoice:
by proforma invoice ID
https://<splynx_domain_address>/ippay/direct-pay-proforma-by-id?item_id=<proforma_id>
by proforma invoice number
https://<splynx_domain_address>/ippay/direct-pay-proforma?item_id=<proforma_number>