Some people experience this "written thoughts" thing as actually happening. It is called thought insertion and it is a symptom of schizophrenia.
The subject has thoughts that she thinks are the thoughts of other
people, somehow occurring in her own mind. It is not that the subject
thinks that other people are making her think certain thoughts as if
by hypnosis or psychokinesis, but that other people think the thoughts
using the subject's mind as a psychological medium.
This can be a pretty unsettling thing if you do not know where the thoughts are coming from, especially if the thoughts themselves are of violent and disturbing things. But if you were ready to receive thoughts (for example you are aware that your telepath associate is going to send you what you need) it could work well, especially if you could readily identify the inserted thoughts when they arrived.