Kick-backs is the most common type of bribery in private companies. In large and middle-sized companies it is most commonly buyers, who receive kick-backs. This practice is often very malignant in its effect on the company; not only does the receiver pocket money, that belongs to the company, but he buys goods at much higher prices than he would be able to, if he had the interest of the company at heart. Sometimes he may even buy goods, which the company has no interest in re-selling or using, thereby reducing the profitability or the ability to compete significantly. Legally valid proof is often very difficult to obtain in such cases, but the most important thing is the elimination of risk.