On 1 December 2005 "the Westfalenstadion" was named in Signal Iduna Park. For the rights of the use of a name of the stadium Borussia Dortmund releases estimated 20 million euro with optimal sporty success. The contract over renaming between Borussia Dortmund and the signal Iduna group of insurance applies up to the season 2010/2011. The Dortmunder fan scene is divided opinion over this step, since he offers on the one hand the financial safety device, but on the other hand a tradition break represents.