Missouri Third Party Summons is a legal process used in Missouri courts to serve a complaint or other court document to a person who is not a party to the case. This process is used in Missouri when the person to be served is not a party to the case and cannot be found within the state of Missouri. It is generally used when the person to be served is in another state, or out of the country. There are two types of Missouri Third Party Summons: a long arm summons and a foreign summons. A long arm summons is used when the person to be served resides in another state. A foreign summons is used when the person to be served resides in a foreign country, or is a foreign citizen living in the United States. Both types of summons require that the court finds that the state or foreign jurisdiction has sufficient contacts with the person to be served for the summons to be valid and binding. The summons must also include specific information that the person being served needs to respond to the summons.