Physics with Tau Leptons at HERA

Recent results of analyses investigating the production of tau leptons in ep collisions at HERA are reviewed. In total, four different types of analyses are presented: the production of τ+τ− pairs, the production of single, isolated tau leptons in events with large missing transverse momentum (in addition to that resulting from the tau decay); plus two searches for specific new phenomena - for doubly charged Higgs bosons with subsequent decay H++→e+τ+ and for tau leptons produced in lepton flavor violating processes ep→τX.