ASSIST was developed by Reksoft (www.reksoft.com), one of the leading Russian IT companies. It was launched into operation in April, 1998 as internet payment gateway for OZON (www.ozon.ru) to provide it with credit card payment option.
Payments are processed in a way that ASSIST redirects customers to its web page to accept a payment. Refunds are not supported. Delayed transactions are also not available with ASSIST since this system does not work with credit cards by the pre-saved cards data.
To start accepting payments using the ASSIST system you need to visit the ASSIST website and set up your Merchant Account. Then you should fill a form for ASSIST plug-in configuration.