The term SERVE A SUMMONS ON can be summarized as the PROCESS of delivering a legal document to an individual or organization. The crossword solution for this term is PROCESS, which is a seven-letter word. Serving a summons is a legal action that requires a person to appear in court or respond to a lawsuit. It is typically done by a law enforcement officer or a PROCESS server. The summons informs the recipient of the legal action being taken against them and the consequences of not responding.