Petit taxis, street food stalls, small riads, medina shopkeepers, and mosque or public toilet attendants often can't break a 200 dirham note — and in the case of taxis, "no change" is sometimes used as a soft way to round the fare up in the driver's favor.
Break large notes at a supermarket, café, or your hotel reception as soon as you get them, and keep a stash of 10, 20, and 50 dirham notes plus coins for small daily purchases. This single habit removes a surprising amount of daily friction — no more awkward standoffs over change, and no more overpaying just because nobody had the right bill.
