I call my some of my costomers for acces als some a window open with my fee inside on the sill.so I call to tell them when and I do not need to collect.
I had one customer ask me to do this, but said no as I really dont like how it looks to someone passing by and see me sticking my hand in the window then sticking money in my pocket. They may get the wrong idea and could create a bad image for my company, so that is a big no no for me.
I personally don't call the night before, however I do tell them when I will be coming by next and tell them to stick it in their diary. If I miss them they get a note telling them, and if I cant do it I call them up then to re-arrange.
However I have been thinking about also sending a text message to the home numbers or mobiles of my customers who I miss, as I cant always post a note if its a security door in the afternoon with no service button.
Its still only a minority though and manage to keep it at bay with my customers by stipulating they must be in or sent a cheque.