Yes. Your ex-spouse’s participation and agreement are not necessary to the Catholic annulment process. The tribunal will get in touch with the ex-spouse, let them know the marriage is being investigated for an annulment, and give them an opportunity to participate. However, their agreement or lack thereof will not inhibit an annulment from being granted. Including the ex-spouse is primarily to give them the opportunity to review any investigative materials, and to have an equal opportunity to participate in the proceedings.