[rosskesava]

well, I've been a window cleaner for just 9 months and have 140 customers so far . I suppose I might have been a bit naive on that commercial deal. I'm from the old school and I believe in a gentleman agreement!  that's probably why when they renaged on that agreement it really got to me! having said that judging by all those very helpful replies I got it seems common practice in commercial jobs! well, I have to put it down to inexperience and move on

Gentleman’s agreement? I wish it was like that. Work would be a lot simpler and easier.

Yeah, we live and learn.

The only time I count my chickens is when the cheque has cleared or the money is in my hand.

[Dave Willis]

I've got Domestic jobs where the price was agreed before the clean and they've never paid!!

Got one cow now who had the nerve to text what a wonderful job I'd done in January and now won't pay.

[Herve garrot]

might be time to put your foot down lol

[Richard S]

the price provided if stated 3 cleans per year at a set rate allows you 3 cleans at that price but this must be confirmed in writing. email confirmation covers you in court.
By law you have formed a legal agreement and in doing so you could reply with a stern reminder of this.
They may bow down.
I did this with a major hotel chain who thought it would be okay to get a just 1 clean and cancel when a 3 clean minimum was agreed before starting.
They paid me and I did the cleans.
Fair is fair.
They are in breech if they confirmed.
Good luck