To qualify as an unfair trade practice, the practice must cause injury to consumers, and consumers must be unable to avoid the trade practice. Unfair trade practices prohibited.Examples of RESTRICTIVE TRADE PRACTICE in a sentence, how to use it. Restrictive trade practices. Example : A, a gas distributor instead his customers to buy gas stove as a condition to give gas connection. Ethical business practices, and Cook. From synthetic leases to inflated revenues, companies employ a variety of cooking-the-books accounting methods to mislead investors. The DTPA prohibits certain acts or practices "in the conduct of any trade or commerce. For example where a trader sells a product to a consumer, acts or omissions which occur further up the supply chain may also constitute commercial practices. A restrictive trade practice is generally one which has the effect of preventing, distorting or restricting competition.