Quote from Wikipedia: The term **Qui pro quo** refers to a mix-up of people, for example, as a tension-building element in a play, and plays on a typo (“qui” instead of “quo”). However, the term not only denotes the mix-up itself but also the situation that can arise from it.
**Qui pro quo** should not be confused with the legal principle **Quid pro quo**. The latter corresponds to the economic principle that a person who gives something should receive an appropriate return. Similar meanings are found in the Latin sayings **manus manum lavat** (“One hand washes the other”) and **do ut des** (“I give so that you give”).
**Qui pro quo** should not be confused with the legal principle **Quid pro quo**. The latter corresponds to the economic principle that a person who gives something should receive an appropriate return. Similar meanings are found in the Latin sayings **manus manum lavat** (“One hand washes the other”) and **do ut des** (“I give so that you give”).