Problems with User registration

I am having problems with users when registering with Password Manager. I have personalized user registration through workflows that ask the user for certain information to carry out the registration (users do not always have a computer and can do it from any computer connected to the internet).

The workflow to register asks for your personal number and certain bank details that only they can know.

The problem I am having is that they have not just registered (I do not know the reason, it may be that they close to the browser), but I see that the comment attribute is filled, and this is generating more incidents for Helpdesk than in the past. Is there any way to put checkpoints during user registration?

Thank you very much in advance.