NON OMITTAS, English practice. The name of a writ directed to the sheriff Where the bailiff of a liberty or franchise, who has the return of writs, neglects or refuses to serve a process, this writ issues commanding the sheriff to enter into the franchise and execute the process himself, or by bis officer, non omittas propter aliquam libertatem. For the despatch of business a non omittas is commonly directed in the first instance. 3 Chit. Pr. 190, 310.