The contribution is in addition to Poland's 2016 annual contribution of $181,561 (£148,000/€171,100), which was an increase of $4,610 (£3,700/€4,300) from 2015.

"WADA is grateful to Poland for having responded to the agency's November 2015 call to Governments of the world for additional contributions towards its Special Investigation Fund," said Sir Craig Reedie, the President of WADA.

"The contribution, which reflects Poland’s partnership and ongoing commitment to the protection of clean athletes worldwide, will be put to good use towards the agency's enhanced intelligence and investigations activity."

Sir Craig said in May 2016 that he hoped to have a $1 million-plus (£690,000/€891,000) investigations fund at his disposal within a matter of months.

Including Poland's contribution, WADA’s Special Investigations Fund has now reached a total of $704,903 (£575,000/€664,000).

WADA spent a combined $3.7 million (£3 million/€3.5 million) on the Richard Pound led Independent Commission, which exposed widespread doping in Russian athletics, and the McLaren Report, which found 1,000 Russian athletes had doping samples manipulated and tampered with between 2011 and 2015.

At present, the organisation is funded by both Governments and the International Olympic Committee (IOC), with an annual budget of $30 million (£24.5 million/€28.3 million).

"Poland is pleased to respond to WADA's call for additional funding," said Witold Bańka, the Polish Minister of Sport and Tourism.

"The alarming outcomes of WADA's Independent Pound Commission in 2015 and the McLaren Investigation in 2016 prove that anti-doping investigations play an ever increasing role in the fight against doping in sport.

"Poland acknowledges WADA's efforts on the investigative front over the last two years.

"Via this contribution, Poland is encouraging the agency to carry out additional intelligence gathering and investigative work aimed at catching more people and/or organisations that attempt to undermine the values of fair play and sportsmanship."

WADA also received a contribution of €150,000 (£130,000/$158,000) from the Government of France in December 2016 while the United States Government will be making a contribution of $2,155,051 (£1.7 million/€2 million) this year, up from $1.9 million (£1.5 million/€1.8 million) in 2016.

Sir Craig admitted last week he was "blindsided" by the release of an IOC letter which revealed his organisation had warned there may not be sufficient evidence in the McLaren Report to bring sanctions against Russian athletes.

The Scot, who says he has since been "assured" by the IOC that it will not happen again, described the letter as "counter-productive".

He also offered a staunch defence of the findings in the document from Canadian lawyer Richard McLaren, who published the second part of his report in December.

An open letter was made public on February 24 where IOC director general Christophe de Kepper claimed that WADA admitted that the evidence in "many cases" against Russian athletes may not be strong enough to impose sanctions.

A meeting took place between the Association of International Olympic Winter Sports Federations (AIOWF) and WADA two weeks ago to discuss the McLaren Report.

It was at this meeting that De Kepper said WADA made the admission, which the organisation then confirmed.

Sir Craig, who was re-elected as WADA President at the Foundation Board meeting in Glasgow in November, was left frustrated by the letter being published but insisted the issue was now in the past.