Sauber have dismissed reports claiming their partnerships with three Russian companies have run into trouble.
The cash-strapped Hinwil squad announced major deals with Russian entities the National Institute of Aviation Technologies (NIAT), the Investment Cooperation International Fund and the State Fund of Development of North-West Russian Federation in July.
However, German media reported earlier this week that several role players are yet to put pen to paper while the board of NIAT had voted against the rescue package.
Sauber, though, have been quick to reject the speculation saying: "Due to erroneous reports and rumours circulating in certain media, we feel compelled to make the following statement:
"The collaboration with Russian partners, as announced by us, is progressing well. The contract with driver Sergey Sirotkin is in place. Preparations for his involvement in the team, as likewise announced, will start next week following the end of the customary holiday period in the sector.
"Beyond this, initial payments to the team have already been made, as per contract.
"A financial involvement on the part of NIAT (National Institute of Aviation Technologies) was never mooted. The plan envisaged a purely technical partnership.
"We are astounded at the heedlessness with which some media are prepared to spread false reports and rumours."