Specifies whether a dialog box should be displayed to prompt the user to digitally sign the document before submitting it.
The showSignatureReminder attribute is an optional attribute of the submit element.
Values include "yes" and "no". The default value is "no". If set to "yes" and the form is not digitally signed when a user tries to submit it, the dialog box is displayed.
The following is an example of the showSignatureReminder attribute as it is used in the submit element: