Police have warned they won't tolerate any pitch invasions ahead of Wales' game against Fiji on Sunday.
A man was banned from the Principality Stadium for life for running onto the pitch during last Saturday's defeat against South Africa.
The 28 year-old was jeered by the crowd as he was kicked out of the Cardiff venue, after staging the pitch invasion just as Liam Williams was attempting to score a try.
South Wales Police said the man has now agreed to a community resolution order after he attended Cardiff Bay police station on Friday morning.
A community resolution is used when an offender accepts responsibility for their actions and is a method of dealing with lower-level crime in a way which is proportionate.
The pitch invader must comply with the order or risk being prosecuted.
Assistant Chief Constable Mark Travis said: ''We worked with the stadium to identify the individual and swift action has already been taken to ban him from buying tickets for any future rugby matches at the venue.''
''Cardiff has built up a reputation for being one of the best venues in the world for hosting major events and we are proud to play our part in keeping visitors to the city safe.''
''What we saw last Saturday at a major international rugby match was not acceptable and will not be tolerated.''
There have been growing concerns about security - and fans' behaviour - at the Principality Stadium, amid the return of crowds on matchdays.
Dan Jarvis, a serial pitch invader, managed to join the New Zealand team lined up for the national anthems before their win over Wales on 30 October.
Meanwhile, a couple from Llantwit Major said they were left soaked in beer after a drunk spectator fell onto them from two rows above, during the South Africa game.
Michael Edwards told WalesOnline he blamed excessive alcohol consumption by some fans and has since complained to the WRU.
Earlier this week, the stadium was described as the "world's biggest pub" by veteran rugby journalist Peter Jackson.
He told BBC Radio Wales that there was ''a serious accident waiting to happen'' unless the Welsh Rugby Union takes action to clampdown on rowdy behaviour.
He added: ''I do not understand why you pay up to £110 for a ticket and then consume so much alcohol that you can hardly see what's happening in front of you.''
''I have never for the life of me understood why they don't close the bars for the 80 minutes during the game.''