PayPal Access allows you to authenticate your Joomla users with PayPal, and reuse that information (firstname, lastname, email, address-data) within Joomla components. Authenticated users are automatically logged into the Joomla! frontend.
First of all, PayPal Access is a product from PayPal that allows users to authenticate against the PayPal user-database. Instead of keeping track of user-records that are scattered all-over the web, with PayPal Access, you only need to keep trace of your PayPal user credentials.
But there's more: After authenticating with PayPal Access, extra user-fields like firstname, lastname but also postcode, country, streetname, city and phone, come available in Joomla!. This means that registration forms could be (in theory) autocompleted without you entering any details. Live could not be easier.
This Yireo extension gets PayPal Access up and running in no time on your Joomla! site, and aims to integrate itself with numerous Joomla! extensions like MageBridge, VirtueMart, Tienda and JomSocial.
PayPal data are added to a $_SESSION['ppa'] array for use in other Joomla! components. This also includes a profile object with address-information of the end-user. If the Authentication Plugin is enabled, you will be logged in automatically.
See for all the steps the Configuring PayPal Access guide.