If you are a PayPal account holder and you use your account to receive payments from the buyers, then you must set up IPN alerts on your account. This shall let you know about the funds that you received in your account as soon as someone pays you for accessing your services.
https://sites.google.com/walle....tslogn.com/paypallog

PayPal Login | Log in to your PayPal account

PayPal Login | Log in to your PayPal account