I gotta say I`m Lucky in these matters, I can always sense who Is going to be a bad payer so for them this is what I do, and it`s a lot better than just walking away.
If the job I am quoting is worth excluding materials £300.00 (for example`s sake) I would price them in the reigion of £450.00. and ask that I want 50% when I get my tools out of the van to make a start. And remainder has to be ready on job completion. (applies on jobs where your`e there for 2 days or more)
when I provide them the quote I do tell them that my Installation Is guranteed to be of quality and safety as I`m a proper sparky and have 20+ years experience and also certified and you get what you pay for.
A) They would turn around and say your expensive and not get you to do the work..... (which I didn`t want to do it anyway).
B) If they go ahead with it, you have made a better mark up and can afford to do a discount on job completion entirely your own choice.
This method has worked for me and with God`s grace I don`t come across these situations that often.
I also have short print at the bottom of my quotes as follows.
Quotation prepared by: ____________________________________________________________________________________
This is a quotation on the goods named, subject to the conditions that all goods remain the property of Horizons Contracts until paid in full. To accept this quotation, sign here and return: