Palmeiras are unhappy with talk that striker Keirrison is on his way to Barcelona in the summer.
Fresh speculation has the 20 year-old being sold by his agents, Traffic, to Barca for £10 million.
In an interview with Jovem Pam, Palmeiras president Toninho Cecilio expressed concern over the low price being mentioned.
Palmeiras coach Wanderley Luxemburgo last week called on Barca to put their money where their mouth was as the speculation was affecting Keirrison's form.