However, Salzburg sports director Christophe Freund denied there was any clause in the Norwegian striker's contract that would give Leipzig the advantage.
"There is no such penalty," Freund told Kicker magazine. "It is not a problem for us. We have not given any club the right to sign any player. Our policy was not in the past and it will not become in the future."
Newspaper reports have indicated Manchester United would like to bid for Halland, who is currently valued at £ 60m.
Halland shone again in his team's 4-1 win over Genk on Wednesday evening in the Champions League, becoming the first teenager in the history of the competition of all names, scoring goals in five consecutive games.
Manchester United's bid to sign Red Bull striker Erling Halland has received a huge boost.
The 19-year-old has raised his tally to 27 goals in 19 games in all competitions this season, including five hat-tricks.
German press reports said recently that Leipzig, which is also owned by Salzburg's Red Bull, had the priority to sign Halland in exchange for a 25.7 million pound contract.