People that apply for a Grant, or need a Visa, should fill the forms. the automatic e-mail says:
Thank you! Your registration for the event YYYY (date and time) has been received.
(followed by the information filled in the form, name, affiliation, e-mail, etc)
You may believe that some people think they are registered in the event, by applying for a Grant or an invitation letter…
It would be much simpler if the automatic text could be personalised e.g.
Thank you! You have applied for a Grant to participate in the event YYYY (date and time).