When using a pre-filled Webform for agreements, it is important to ensure that the form template is constructed in a way that supports the flow of your form.

If you plan to pre-fill a form with information before sharing the link, it is essential to lock any fields that you do not want the third party to be able to edit. 

To lock a field in a Webform template while building it, you can go to Forms > View form templates > select Edit for the desired Template > Navigate to Form Builder > select the desired field > access its properties, and check the 'Locked for Web Form' checkbox.