I have to admit that I was ill advised by our social care services at the initial setting up of my daughters D.P. It was at a time when Social care workers didn't seem to know that much about it themselves and so were ill equipped with information in helping others.
I have never penned a letter to DWP telling them of daughters D.P as it wasn't something I had been told I needed to do. However if on any of the forms we have sent out I'm sure this would have been disclosed by me as I am very up front with information.
Any monies which you are not using from D.P. will be taken back and will be viewed as over funded. You may have your monthly D.P. allowance dropped under a re-assessment.