Interestingly enough, requesting a copy of my notes several years ago enabled me to clear up a day hospital related mystery - I was discharged before I felt ready and didn't know why - when I read the notes, it turns out they thought they'd offered me a place in a women's support group that I never turned up to. So I was booted from the whole day hospital programme for noncompliance. Except I never knew anything about a women's group 
They were really terrible about communication back then, even worse than now - letters from them were usually franked two weeks later than the date on the letterhead, would often arrive after the appointment they were offering, or never turned up at all. They would blame my postal service, or my flakiness personally, treat me as an unreliable and noncompliant liar, etc., and DP too (both for my appointments and his). Always blame the patient, though, eh?
That's one of the perks of working in mental health; your patients have zero credibility.