odd, mine is exactly the same apart from it says if you call...... so i dont know if i should ring or not

i've recieved the same letter but i'm not sure whether it states that its mandatory to call or not it does say "if you call us now we will help you make sure your tax credit claim is right before we start making our checks". it also says "please call me ...... we will help you check that the information that we have is correct and up tp date and if not put it right" i'm in a similar situation in that i have a boyfriend that doesn't live wth me or pay any bills for my household as he does this at his own address