According to the Salesforce documentation, the explanation for why the completion actions did not occur when the client submitted their Marketing Cloud Account Engagement form to test the form's completion actions is: A) The client has a visitor filter set up to filter activities from their IP address. Completion actions do not occur on filtered visitors. A visitor filter is a feature that allows users to exclude certain visitors from being tracked and reported in Marketing Cloud Account Engagement. A visitor filter can be based on IP address, location, or domain. A visitor filter can help users to avoid tracking their own activities or those of their competitors. A completion action is an automation tool that can be used to perform an action after a prospect successfully completes a marketing element, such as submitting a form, clicking a link, or visiting a web page. A completion action can be used to perform actions such as adding a prospect to a list, assigning a prospect to a user, sending an autoresponder email, or adjusting a prospect's score. However, completion actions do not occur on filtered visitors, as they are not tracked or reported in Marketing Cloud Account Engagement. Therefore, if the client has a visitor filter set up to filter activities from their IP address, the completion actions will not occur when they submit the form. The 'email' form field being set up to exclude free email addresses, the client not un-pausing the completion actions, or kiosk mode being enabled on the form are not the explanations for why the completion actions did not occur when the client submitted their Marketing Cloud Account Engagement form to test the form's completion actions, as they are either irrelevant, incorrect, or nonexistent options for the form or the completion actions. Reference: Salesforce documentation