Quality assurance is a vital part of trademark licensing, because where there is unfettered use of a mark by another party, a trademark will lose its ability to identify a single source. If such uncontrolled use continues it may lead to the inadvertent abandonment of the licensor/owner's trademark rights. Assuring quality may require provisions drafted into the license for adequate restrictions on use, and supervision of the quality of the underlying goods and the use of the mark itself.