Quik! offers several e-sign methods depending on your needs. In general, here's how to choose the one that's right for you. Also review the three process flows below as a reference. Each methodology is fully explained later in this document.
What do you need?
Callback
Pass-Thru
Self-Service
Systems that limit customizations (i.e. Salesforce.com)
YES
Possible
Easy to deploy but data passes through your servers
YES
Possible
100% control over every aspect of the signing process