Nice advice or you only sell the goods you know that you can easily cover for. Maybe goods that don't really worth it. We also need to be separating business money from personal money and never business money out.I can say the only way you can stop or prevent a difficult debitor is to not sell credit product for customers. Because if you want collect your money from a debit customers you don't have choice than to collect it in gentle ways if you don't want to lose the customer, then some customers will prefer to pay pre-one and collect Another credit.