“It’s one thing to run afoul of the gift ban, a civil matter at best,” said Daniel J. French, a former federal prosecutor who served on the commission until late last year. “It’s quite another to have lied under oath, which, if proven, is a criminal matter with far-reaching implications to office and liberty.”

Blair Horner, legislative director of the New York Public Interest Research Group, which filed a formal complaint with the commission when news of the tickets emerged last fall, called the panel’s finding “unprecedented.”

“I know of no other time where it’s been alleged by what is basically a police agency that the governor lied under oath,” Mr. Horner said.

In the domestic violence case, Attorney General Andrew M. Cuomo is investigating whether the governor or other state officials pressured a woman who said she was assaulted by Mr. Johnson so that she would not pursue an order of protection against the aide. Mr. Paterson is expected to be questioned under oath in that inquiry.

Mr. Johnson attended the World Series game with the governor, and he was involved in soliciting the tickets from Yankees officials. The report also suggests that Mr. Johnson may have backdated the governor’s check.

According to the commission’s report, Mr. Paterson decided after the Yankees won the American League championship that he wanted to attend the first game of the World Series and directed Mr. Johnson to solicit tickets from the Yankees, including tickets for his son, Alex, and a friend of his son.

Image Gov. David A. Paterson with Senate Minority Leader Dean G. Skelos, left, and Senate Democratic Leader John L. Sampson at at a leadership meeting in Albany on Wednesday. Credit... Nathaniel Brooks for The New York Times

Mr. Johnson then directed the governor’s scheduler to request five or six tickets for the Oct. 28 game, and told the team that Mr. Paterson would be attending in a ceremonial capacity as governor and would not be paying for the tickets.