Can I use this for a online waiver for my facility.

Hey,

can I use this one for creating an online waiver for my facility. Quick customer sign. 

i also want to capture emails for marketing. 

Hi, this is possible, you can build your form and add the signature field: https://www.jotform.com/help/433-How-to-Add-an-E-Signature-to-Your-Form

As well, you can clone a template and modify to your needs: https://www.jotform.com/form-templates/search/waiver