Commencing a divorce action requires personal service on the adversary, which can be tricky if the adversary cannot be found, is located outside of the country, or is looking to avoid service.
If these circumstances exist, enough due diligence must be done prior to asking the Court for an alternative method of service. Courts have become more flexible with allowing email service and/or service through social media platforms if it can be shown that sufficient notice would be provided, but you need an experienced attorney to be able to prove the efforts that were completed prior to asking the Court for permission to serve an alternative way.
It is a simple step that can be taken for granted, but extremely important to be done properly so that the divorce litigation can move forward.