Switzerland’s federal police advised that the Russian oligarch Roman Abramovich posed a “threat to public security and a reputational risk” to the country if he became a resident, it has emerged.

The Chelsea football club owner on Tuesday lost a seven-month legal battle against a newspaper publisher to prevent the publication of information on the reasons for his failure to secure Swiss residency.

The battle between Abramovich and the Zurich publisher Tamedia began in February after the group obtained details of a letter written by police, who were asked by the state migration secretariat to give their view on whether the oligarch should be allowed to move to the canton of Valais.

Abramovich, who owns a £90m mansion in Kensington Palace Gardens, London, had applied for Swiss residency in July 2016, hoping to make the exclusive ski resort of Verbier his official home.

However, after a detailed review of the files concerning one of the world’s richest men, police raised a number of concerns. According to Tamedia, police reported that Abramovich was known for “suspicion of money laundering and presumed contacts with criminal organisations”. They also asserted that there was reason to believe that “the applicant’s assets are at least partially of illegal origin”.

Abramovich’s lawyer, Daniel Glasl, has responded to the explosive allegations by filing a request for correction of facts to the federal police. He said he planned to file a criminal complaint against whoever disseminated the information.

“Any suggestion that Mr Abramovich has been involved in money laundering or has contacts with criminal organisations is entirely false. Mr Abramovich has never been charged with participating in money laundering and does not have a criminal record. He has never had, or been alleged to have, connections with criminal organisations.”

The allegations are not based on any court rulings, and the oligarch has never been indicted in Switzerland. They are based on police information which cannot be easily verified, and Abramovich is entitled to be presumed innocent.

In February, the oligarch secured an injunction banning any mention in the media of police concerns. That ruling was overturned in a legal process which ended on Friday when the Swiss federal supreme court rejected Abramovich’s appeal. Tamedia published its story on Tuesday morning.

After acquiring Chelsea in 2003 and transforming the club’s fortunes with an investment of more than £1.1bn of his own money, Abramovich became the poster boy for the privileged group of Russian moneymen who have made London their home over the last three decades.

However, since the poisoning of the Russian former spy Sergei Skripal in Salisbury in March, Britain has taken steps to stem the flow of money from Moscow. Abramovich withdrew his application to renew his UK residency visa this spring. In May, the oligarch obtained Israeli citizenship under the country’s law of return, which allows any Jewish person to become a citizen.

In the same month, Chelsea shelved ambitious plans to redevelop their Stamford Bridge stadium and in August they were forced to deny reports that Abramovich was looking to sell the club.

The New York merchant bank Raine Group has reportedly been appointed to advise on a full or partial sale of the premier league team. Bloomberg reported today that Abramovich had rejected bids over $2.3 billion and was seeking $3bn. The sum, if he secures it, would represent the highest ever paid for a sports team.

Visa troubles have left Abramovich unable to work in the UK. His Israeli passport allows him to visit Britain for up to six months each year, but Israeli nationals are required to obtain a visa if they want to work, live or study in Britain. If he were to re-apply for a UK visa, the tycoon would have to submit to an examination of the source of his wealth, under tighter controls introduced since his last visa renewal.

The canton of Valais had originally accepted Abramovich’s application, on the grounds that his financial profile would make him an “interesting taxpayer” for the area. However, the authorities at federal level appear to have taken a different view. In June 2017, Abramovich withdrew his Swiss residency application.

In a written statement, his lawyer added: “Mr Abramovich has submitted to numerous, thorough background checks by governments and business partners over the years and such unsubstantiated allegations have never been an issue.”