In an interview with Polish news service TVN24, Mr Waszczykowski criticised the election procedures that led to Donald Tusk’s second term.
He claimed no one asked any of the 28 member states if they supported Mr Tusk’s re-election bid and that there was no formal voting process.
Mr Waszczykowski said: “It is untrue that we lost 27 to one, because no one asked the 27 counties, who is for, who abstains from voting.”
Minister Witold Waszczykowski questioned the legality of Donald Tusk's second term
The disgruntled politician went on further to claim the vote was “faked”.
He said: “We have expertise today telling us Tusk was elected in a way which can be questioned, on the level of European law".
He announced his plans to provided the evidence to the Prime Minster Beata Szydło, but it is unclear if the government will act upon this news.
Merkel's plea for Tusk Thu, March 9, 2017
Merkel, who spoke ahead of a EU summit in Brussels, said the planned re-election of Poland's Donald Tusk as president of the European Union is a "sign of stability" for the bloc, despite bitter opposition from Warsaw
Play slideshow AFP/Getty Images 1 of 7
French President Francois Hollande speaks with German Chancellor Angela Merkel on the second day of a European Summit at the Europa Building at the EU headquarters in Brussels
We have expertise today telling us Tusk was elected in a way which can be questioned, on the level of European law
Witold Waszczykowski, Poland's Foreign Affairs Minister
Mr Waszczykowski said: “I do not know if it is worth it, because the consequences of the choice are not crucial, [Mr Tusk’s] position is not that important.”
Get Quotes on Home Insurance
Out of the 28 EU member states, Poland was the only one to openly oppose Mr Tusk, pushing forward its own candidate Jacek Saryusz-Wolski.
The minister reminded that a second terms as Council President follows voting conventions under EU laws rather then a renewal of the mandate.
Mr Waszczykowski claimed no official voting took place at the EU summit
Mr Tusk will serve for a second two-and-a-half-year term as EU Council President
He said: “It is a second term. There is no such thing as renewing the mandate.
“Article 15 clearly states: A vote will be held for a second term, that is a majority vote.”