Guide to Dueling in the Elder Scrolls Online

The Elder Scrolls Online is more attractive and interesting now, here comes the newest announcement of the ESO Update 12! One of the biggest features coming with Update 12 is the ability to fight another player from any alliance with our new dueling system! This will allow you to test new builds, try a different fighting style, or simply kill some time before hopping into a dungeon.

HOW TO START A DUEL
Duels can take place in any non-PvP overland zone (let's keep Cyrodiil as a true battle zone!). To begin a duel, first open the social interaction wheel when interacting with another player and choose “Invite to Duel". Alternatively, you can also type “/duel [player name]"with a nearby player. After the challenged opponent accepts the duel invitation, a flag will appear and there will be a short countdown before you begin, so get ready! Once someone reaches zero hitpoints, the duel will conclude; the losing player will be offered a free resurrection, though, or can also be resurrected by other players. If you don’t want to be involved in the duel system you can turn on auto-decline in the social panel of the options menu.
During one-on-one combat, you'll need to stay within a certain radius centered around the flag, but don't worry; you'll be notified if you are nearing the edge, and we've made it a fairly sizeable area to move around in. If you leave your dueling area, the match will result in a forfeit. It's also worth mentioning that other players not participating in the duel will not be able to heal or buff the two duelers, but the Battle Spirit buff will be applied. Combat with monsters will also not interrupt or end your duel.
More details: https://www.mmogah.com/news/title/eso-s-new-dueling-system-is-coming