If one spouse doesn’t want the divorce or refuses to participate, it won’t stop the process, but it can slow things down. In this case, the person applying for the divorce must file a sole application and arrange to serve the divorce papers on the other party.
Serving documents can be tricky if the other party avoids service or doesn’t keep their contact details up to date. If you're unable to locate your ex or they refuse to accept service, you may need to apply for substituted service or dispensation of service, both of which involve further court steps and can delay proceedings.