Police officers seized eight theatre tickets they believe to be stolen during a search of a house in Sheffield.
The tickets for Mamma Mia at the Novello Theatre in London in April were found in a house in Four Wells Drive, Hackenthorpe, in January.
A South Yorkshire Police spokeswoman said:" Eight tickets to see Mamma Mia at the Novello Theatre in London in April were recovered as part of the search and are suspected to have been stolen.
"Despite a number of enquiries, the owners of the tickets have not been traced.
"If you think the tickets may be yours, please call."
Dial 101 or email firstname.lastname@example.org quoting incident number 399 of March 15, 2017.