Just wanted to paste a PHP solution for a Paypal refund. It was found on Paypal official site, but I spent some time to get it.
If you need to verify your Paypal account balance for any reason, a simple script will help you to do this. First of all, you need to request API credintials, if you haven’t done this yet. A detailed instruction is available here. Actually interface is a bit different, but it still can be found under “My account” section.… Read More »
A PayPal Fee Calculator can calculate charges on services. The method is entirely electronic and avoids the use of checks, drafts and money orders.
First thing I implemented to protect myself against fraud payments was to deliver electronic goods to Paypal e-mail. It greatly decreased the number of fraud purchases, as this way user must have access to e-mail, associated with a Paypal account, not only to account itself.
This is the most common error when you are trying to accept Webmoney through merchant system. If you are getting this error, you should check your merchant area as your purse was disconnected for any reason.