Rychlewicz never applied for recognition for his actions or advertised them, according to the report.
Within minutes the tweet had been deleted and soon after, Israel Hayom announced that its site had been hacked and that the tweet about Trump was a fraud.
Respondents were also given various scenarios if the leadership of different parties were to change.
The Adelsons’ relations with the Netanyahus has suffered lately.
Further testimonies from the wife of tycoon Sheldon Adelson were revealed on news channel 12 on Friday, that PM Benjamin Netanyahu's wife allegedly asked the couple to purchase gifts for them
By ruling out a unity government, which current polls suggest is the only government he can form, Netanyahu’s article may be seen in retrospect as the prime minister firing himself.
She spoke just hours after Prime Minister Benjamin Netanyahu said that Israeli retention of the Jordan Valley, located between Jerusalem and the country of Jordan, is vital for Israel’s security.
In the letter, Gantz went on to say that reports were intended to hurt him politically, since Israel Hayom "is acting in the service of Prime Minister Benjamin Netanyahu."
Adelson gave $30 million to Trump's 2016 presidential campaign and $100 million to the GOP for its midterm races in 2018.