But there is just as much information that does not have to be disclosed — and that means that people with checkered histories can continue to thrive in the industry.

On Finra’s website, each broker’s history is displayed in a vertical timeline, with red dots marking the date of each trouble spot.

There are five red dots on Mr. Greenberg’s timeline. They represent a 1984 charge, eventually dismissed, of theft by check; a 2001 charge of criminal mischief in the first degree, also dismissed; two disputes with clients; and a regulatory penalty.

But that record does not reveal Mr. Greenberg’s other run-ins with law enforcement and the judicial system, which are not required to be disclosed to Finra.

In 2000, Mr. Greenberg admitted in an arbitration proceeding that he had phoned someone who did a lot of business with a colleague and told him, inaccurately, that the colleague was known for shady business practices, according to a record of the proceeding. Mr. Greenberg was not punished for what the three-person arbitration panel deemed was defamation because the statute of limitations had expired, the panel said in its decision.

In December 2006, Mr. Greenberg was charged with harassment and criminal mischief, according to court papers and a police blotter item in The Lake Oswego Review. He had violated a restraining order taken out by his ex-girlfriend, the second woman to ask for protection against him, according to the court papers. Mr. Greenberg eventually pleaded no contest to a misdemeanor charge of criminal trespass and agreed to limitations on his movements, according to a plea deal reviewed by The Times.