Does the client pay small sums directly, delaying larger ones?

Does the client pay small sums directly, delaying larger ones? http://detective-zakynthinos.com/Content.asp?Code=000058
Dealing with customers refusing to pay, despite prior acceptance of delivery of a perfectly executed order, is a matter worth planning for. Researching a potential client’s creditworthiness, finding out their previous history regarding suppliers and sniffing out any signs of impending financial difficulties are all actions you might opt to have carried out before accepting the order.