Strange letter from EU Treaty

Hi, ill be brief:
its an EU Family visa case, we arrived in June and applied, they sent a letter about a month later stating they received a list of documents and a short list of what else we need to send them (payslips etc..), since then we were sending most of the documents they required slowly bit by bit.

Now yesterday they sent a new letter (it's been over a month since the last letter), and they wrote "we acknowledge the receipt of your correspondence" bla bla bla, "you must advise the office of any changes, a decision will be reached on your application in due course"

that's it, that's ALL the letter said. what is the point, anyone has a clue? they already wrote the same type of letter before, Yes I know a decision will be made, in the previous letter they Actually wrote a date and list of documents my file contains.. the new letter contains basically no info. what purpose does this new letter serves?

Thanks, hoping someone can answer.

p.s: my application decision is due by december.

Hi Cheloz,

We have at least 6 letters like that, every time u send additional information they send similar letter,

Don't worry at all, INID are the most unorganised organisation which u will realise soon,

there are just examining your documents you might receive a approval for treaty right soon
its just wait and see game.
results will be positive
j_k