Forced tips at drive through

Have you tried different locations?
Maybe it's at certain areas or neighbourhood with 'questionable' employees.
 
Does this happens to me only or does anybody else have the same experience:

Every time that I go to a drive through the don't give me my change back unless I request it. McDonals, Taco Bell and the worst Tim Hortons. You buy a coffee for $1.70 pay with a twoonie and the attendant starts doing something else instead of giving you the change. I ussually have to knock on the window to request it.

It use to be like this only at strip bars where the waitress would be really slow at returning your change if she did it at all, but now is everywhere. I'm not cheap and I don't mind tipping but I think it should be my prerogative to do it.
Why you would put up with this once is beyond me. Some kid at the window steals your change, and all you do is rant about it online?
 
Do you really think a manager gives a shit? He is lucky to even get the kids into work on time

Then make the Manager give a shit. Get out of your car, go into the store, and complain so people can hear! Make sure the Manager knows his employees are stealing from you! Fill out the customer survey that all the drive-thrus hand out!

But I guess it's just so much easier to complain to a forum like this.
 
I have had people short change me, I do not say anything if it is a buck or two. The next time I pay in the exact amount or very close with $1 and $2 coins.
 
Never happened to me, ever, and never even heard of it at any Canadian chain before now.