Initiative and referendum petitions must be filed with?

The answer to this question is state specific as it depends on the statutes or Constitution of the state in which the initiative or referendum petition would be filed. My experience is in the Commonwealth of Massachusetts where I served in the House of Representatives. In Massachusetts, the Initiative and Referendum petitions are filed with the Secretary of the Commonwealth. If the person who filed this inquiry indicated the state in which he/she would be filing, we can provide an more accurate response.