Proper Authorised money shops will count the money out in front of you, they will NOT touch the money again and it is then your responsibility to count the money personally before you leave!
Some places actually have a counting machine they put the money through in front of you.
I changed money every 2nd day during my 14 day stay and not once was there anything I wasn’t happy about in a money change shop.
NEVER change money in a place that says authorized money changer but is in a Tacky Gift or clothing Shop. These places always show much better to good to be true rates.
Only use the exchange places that have the rate in the window electronically, have CCTV. have a person behind a secure Glass window or staff using computers at desks however get the money from a person behind a secure glass screen.