Both men were interviewed in relation to the tagging of the CTV site where 115 died when the six-storey office tower collapsed in the magnitude-6.3 February 22, 2011 quake.
They were also questioned over graffiti at C1 Espresso, a construction site fence on Armagh St, a power box on Manchester St, traffic barriers at the intersection of Cashel St and High St, and a number of signs around Lichfield St and Manchester St.
The third man was not identified until yesterday by police, Senior Sergeant Phil Dean of Christchurch Police said. After speaking to the men, only the 27-year-old faces criminal charges.
"The other two guys will not be charged," Mr Dean said.
"We're relatively confident that the person we're charging is the only person involved in the criminal activity."
All three were intoxicated at the time and had been spoken to them about alcohol consumption.
The man was extremely remorseful and had already written a letter of apology, Mr Dean said.
"He was a visitor to Christchurch for the weekend and hadn't realised the significance of the site.
"If he had, I'm confident he wouldn't have tagged there. But nevertheless there would have been nine other locations that he would have tagged.
"Tagging and graffiti is a constant thing communities all over New Zealand are battling. It's disappointing that visitors to our city would act in that way."
Police have asked for the case to be heard in Christchurch.
