Catalan daily Sport reported on Monday that a deal had already been signed between Neymar and Barcelona in 2011.
However, as is now the norm for Neymar, who is continually linked with moves away from Santos, he says there is no such agreement.
"I've said a thousand times that there is nothing certain with Barcelona. I'm a Santos player, this is all I have to say," he told Globo Esporte.
Santos vice president Ordilio Rodrigues also added that they do not know anything regarding an arrangement between the player and Barcelona.
"Santos denies absolutely the existence of that contract. We haven't known anything about that in any moment. Neymar hasn't signed a contract with Barcelona or any other team," he insisted.
"We have an excellent relationship with Neymar's father and he never told us anything about that supposed contract or even any other.
"People need to know that it doesn't only depend on a team to be interested in Neymar, it depends on that if he wants to be transferred. It has three parts, the team that wants to buy, the team that accepts to sell and the player."