If you use PayPal Standard as your payment processor please make sure that you enable IPN (Instant Payment Notification) on your PayPal account so that your sales can be recorded in Zaxaa.
Here is how you can enable IPN on your PayPal account:
1. Login to PayPal. Go to your PayPal Profile and click My selling tools.
2. In your PayPal Profile, click My selling tools, click Instant Payment Notification. Follow the instructions to enable your IPN including entering your Notification URL (you can fill it with https://www.zaxaa.com/notify/ipns).