Please help!! I've come home today to a letter from HMRC Tax Credits. They want to investigate my Single Person claim as there is another adult at this address. Now, I live in my ex partners mothers house with him. I have no utility bills in my name all his I am not on any official rent book so to speak but I am listed with him on council tax and electoral role. We have never claimed any benefit. We have 2 children 4 & 2 who both attend nursery as we both work. We reside at this same address but are not a couple! We share all parenting duties from bathing feeding etc and live as a family unit for the sake of our children under the one roof but are not connected emotionally or financially. We have a strong maternal relationship which is best for all of us. He has a room I have a room and the children share a room. I have never claimed CTC fraudulently although now I have received this letter I am terrified what we've done is wrong! I have nothing in "our" names only his or mine and neither of us are homeowners we just live at his mums house! Please please help I'm terrified - anything welcome or if anyone had similar? Thanks