DLA MR Phone call

I received a call saying they are looking at my child’s mr they asked if I have anything to add and I said how long for the decision and they told me I will get a letter by next week and asked if my address is the same they also asked if my bank details are the same and asked if I would handle a certain about in my bank.. do the do that for all MR? Has anyone had that and it been decline/not changed ?