Regularly agreed in employment contracts, exclusion clauses shorten the statutory limitation period for claims arising in the employment relationship and ensure certainty between employer and employee especially with regards to claims that are years old. In a remarkable decision the German Federal Labour Court (BAG, 26.11.2020 – ref. 8 AZR 58/20) has fundamentally changed the case law with regard to the drafting of these clauses. A large number of the exclusion clauses used in practice are now likely to be ineffective.