Has
You can write a letter, explaining what has happened and correcting the mistakes, it will probably too late to send it to Maximus so take it with you to the assessment and ask the assessor to read it and include it in your file when they return it to the DWP.
I would use the same format as the ESA50 wherever you can.
I would also send a copy to the DWP office dealing with your claim.
Our ESA Claim guides cover the criteria you need to meet and also have sections on the assessment and the questions you are likely to be asked.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
