Could you give some more information? Some images could help too. Snip & Sketch

Are you using an electronic signature or some 3rd party program to get signatures? Or do you want to just load the signature into the form from a image file somewhere? If you just want to set a value or load something in the after update event of a check box that wouldn't be hard, but I'm not sure if that's what you're trying to do.

I don't generally recommend storing images in your tables. See Images.

And yes, we need to know a lot more about exactly what you want to happen in order to help you.

And I don't have any tick boxes. I've been wearing my flea and tick collar. I do have check boxes though. :)