I am creating a training tracking Smartsheet for our field employees. My challenge is coming up with a way to add signature lines (and text box) for all employees on-site for training to verify with signature that they have attended. I don't know beforehand who will be on-site for the training and the employees are union carpenters, masons, laborers and ironworkers that rotate out and may only be on-site for day. Due to their revolving nature they don't have company email addresses. Any direction you may be able to send my way would be appreciated.