Ive had dozens and dozens of bad customers over the years to get where i am today.
But like Daz says a lot of the time you can tell, quite a few times ive been doing a new one walked in the garden and thought shes not gonna pay and half the time im right. Quite a few doss holes round here unfortunately.
Bad payers come from anywhere as do messers but sometimes you just know and youve only yourself to blame.