The Spurs midfielder has been widely linked with a return to the Bundesliga, and Klaus-Michael Kuhne is urging fans to pool their resources in a bid to sign the player
The Netherlands international is reportedly nearing an exit at White Hart Lane, with a number of clubs interested in the 29-year-old.
And Kuhne believes that a Hamburg return could be a possibility for the player, who made a total of 112 appearances for the club, between 2005 and 2008, with a potential outlay of €35 million in transfer fees and salary being mooted.
"I do not want to take over for the most part. But whether I would participate or not is another issue," he is quoted as saying by Bild.
"I would have suggested... If 60,000 members could come together and spend an average of €100, it would be a considerable sum.
"If you can mobilise only half of that, it would be a great thing."
Van der Vaart, who joined Tottenham from Real Madrid in 2010, has two years remaining on his four-year contract at White Hart Lane.