All the tickets for this year's Weihnachtssingen were sold out within hours.
However, some Union fans will not be able to attend at the last minute.
Union members who want to put up their tickets for sale for Weihnachtssingen can do this from Thursday December 13 at 11am on the club's secondary ticket market*.
Those interested in buying are advised that only members can purchase.
In addition, the number of tickets is limited to a maximum of four per member.
Some VIP tickets for the Schlosserei will be available from the Union-Zeughaus immediately.
Questions about the secondary ticket market can be sent via email to email@example.com or via telephone 030656688100.
*Does not apply to free tickets given to members and tickets from competitions or special offers.