It all depends on the teacher you are dealing with how much they will act on it (and the school).
In our case, we have dealt with two distinctly different schools, within the same state.
The first school ignored my request (sent in writing by note in child's agenda) to begin IEP process. Eventually, I went down there in person, and got some help. But, it was near the end of the school year. We moved during the summer.
At the second school, I mentioned the possible need for it, verbally to the teacher. She immediately made arrangements for testing (while I was still sitting beside her desk), and continuously kept me updated.
What I noticed, was that every time they made a new step they had ME sign something saying I received it.
You can do the same. Write whatever notes you want to and have the teacher sign saying she received it, etc.
And, when you have an IEP meeting, use the notes section on it - write whatever notes you want there - There should be many people in the room signing witness to it.
God Bless!
Amy