New Contact or Existing - How SF Recognizes ?

[CnP.Support]

Good day!

The contact matching follows the same rules as the other matching rules for payment processing.

See: http://forums.clickandpledge.com/content.php?r=341-Customize-Contact-Creation

Please let us know if we can be of any further assistance.

[elkiehound]

When someone registers for an event, what field(s) are matched in exiting SF contacts to determine if the record already exists ?