Barack Obama visits Seoul , meets with South Korea 's Moon Jae-in . 
Moon , who had recently returned from his first summit with U.S. President Donald Trump , made the remarks during an informal meeting with former President Barack Obama in Seoul , local news service Money Today reported . 
Moon told Obama he and Trump had agreed that sanctions and pressure on North Korea would be accompanied with incentives for dialogue . 
Obama told Moon he seeks advice on how to further develop the U.S.-South Korea alliance . 
Yoon Young-chan , a spokesman for the presidential Blue House , said Obama came to Korea in a personal capacity . 
Obama also delivered the keynote speech at the eighth annual Asian Leadership Conference in Seoul , the Chosun Ilbo reported . 
So long as North Korea chooses to remain outside of that order , they must face the consequences ," Obama said .
Moon , who had recently returned from his first summit with U.S. President Donald Trump , made the remarks during an informal meeting with [TGT] , local news service Money Today reported . 
Moon told [TGT] he and Trump had agreed that sanctions and pressure on North Korea would be accompanied with incentives for dialogue . 
[TGT] told Moon [TGT] seeks advice on how to further develop the U.S.-South Korea alliance . 
Yoon Young-chan , a spokesman for the presidential Blue House , said [TGT] came to Korea in a personal capacity . 
[TGT] also delivered the keynote speech at the eighth annual Asian Leadership Conference in Seoul , the Chosun Ilbo reported . 
So long as North Korea chooses to remain outside of that order , they must face the consequences ," [TGT] said .