over the years I have been done many many times mostly for small amounts the largest was £500 for a school.
subbed out work seems to be the worst for this as the person higher up the food chain seems to want to make an extra buck by not paying you.
tenants moving out the day after you clean the windows is a regular which in my opinion is theft just to protect their deposit.
next, is the want it done but don't want to pay or knockers as they are called in London. again theft , some make very good livings out of getting people to work and never ever have the intention to pay.
its not just builders who suffer from this.
some races seem to enjoy the thrill of getting you to waste time and effort trying to get small amounts of cash out of them come tomorrow or getting the non English speaking granny to deal with you until you just give up they just wait for the next mug and so on.....
some move some die.....
once the son rang and said the mum had died and no we wont be paying your bill .............a week later I saw the mum in Sainsbury's resurrection personified

I said what a miracle praise the lord your back from the dead with no embarrassment they just didn't want to pay .

and taunted me cant pay wont pay makes you mad but you just get on with it