Polish media outlets Radio Zet and Newsweek Polska reported that the event, organised by private foundation Centrum Strategii Rozwojowych (CSR), offered sponsorship packages including a USD 100,000 "Platinum" option that was described as including a one-on-one conversation with the president.
A USD 50,000 "Gold" package reportedly offered a meeting in a small group, while a USD 25,000 "Silver" package was also available.
The outlets reported that the president's office had invited companies to the event but directed questions about the sponsorship arrangements to the foundation.
They also said that CSR was established by people who had been appointed to state-controlled companies under former Prime Minister Mateusz Morawiecki and who now sit on advisory councils to the president.
Presidential spokesman Rafał Leśkiewicz on Sunday described the reports as part of a "witch-hunt" against Nawrocki and said no one had been required to pay to attend or participate.
He added that the president's office had made no statements linking attendance or a meeting with Nawrocki to payment.
Leśkiewicz compared the summit with economic conferences in Karpacz and Krynica, which also have sponsors and partners.
Nawrocki is due to deliver an opening speech but will not take part in panels organised by CSR, he wrote on X.
CSR said no company had signed up for the top sponsorship package and that none of its partnership agreements included a meeting with the president or his office.
According to a statement issued by the foundation, about 10 percent of institutional participants were sponsors and that attendance at parts of the event where the president would be present had never depended on payment.
CSR said it would take legal action over what it described as "numerous distortions".
Karol Rabenda, a minister in the president's office, told reporters in New York that the allegations were baseless and that more than 100 companies had been invited without additional conditions.
He said Nawrocki alone decides whom he meets.
The reports drew criticism from members of the ruling coalition.
Government spokesman Adam Szłapka asked on X whether access to the president could now be obtained "together with a sufficiently large bank transfer."
Tomasz Siemoniak, the minister responsible for overseeing Poland's security services, wrote on social media that such standards had not previously been seen in Poland.
Marcin Horała, a deputy speaker of parliament from the opposition Development Plus grouping, said the organisers may have "crossed a line" in their suggestions, but that the matter did not implicate the president personally.
Nawrocki is due to attend the summit on Monday during a visit to the United States.
(ał)
Source: PAP