Mr Appolinaris Stefanus Leo Anis (popularly known as Leo), passed away from a heart attack in Bogor, Indoesia, on 9 August. He had graced us with his presence at our AAPG Technical Symposium, held in Bogor from 7-8 August 2019. Leo was a Keynote Speaker and a Session Chair. We wish his wife Trivina, and children Alvin and Katarina, our deepest and sincerest condolences and much strength during this very hard time. He had just turned 50.