How do political elites perceive regional intergovernmental organizations that seek to promote democracy? When do political elites view regional intergovernmental institutions promoting democracy as legitimate? Many informal and formal types of regional intergovernmental institutions have sought to spread democracy. However, previous research on the nexus of regional intergovernmental institutions and democracy has focused primarily on the latter. Furthermore, these studies claim that membership in these formal international institutions (a.k.a. international organizations) increases the likelihood of the democratic survival of a newly democratic regime. Membership in these organizations provides a seal of approval that the newly democratic country intends to remain democratic. This kind of external validation should dissuade spoilers from undermining the transition and encourage ordinary people to support the transitional regime. This argument assumes that the domestic audience trusts this organization and believes it plays a vital role in society. Whether elites have confidence that the regional organization can positively impact democratic consolidation and how they perceive different types of regional organizations promoting democracy are empirical questions. This project seeks to answer these questions through a small sample and non-population-based elite survey experiment in Malaysia, Indonesia, and the Philippines. I also run a laboratory survey experiment with a larger sample of university students, giving me the opportunity for statistical power. The results suggest that political elites are skeptical of regional intergovernmental bodies promoting democracy. Meanwhile, non-elites consider regional institutions promoting democracy illegitimate when they are informal, i.e., no written shared expectations, rules, and permanent secretariat. When regional interstate cooperation on democracy operates under a formal procedure or codified in an international treaty and supported by a permanent secretariat, non-elites tend to consider them more legitimate.