Treu und Glauben

figuratively

信義誠実の原則 / 誠実・信義に従うこと

English Meaning

(law or figurative) good faith, bona fides, sincerity, honesty, especially during the process of concluding contracts

Bei Vertragsverhandlungen müssen alle Parteien in Treu und Glauben handeln, um Vertrauen aufzubauen.

契約交渉の際には、すべての当事者が信頼を築くために善意をもって行動しなければなりません。

During contract negotiations, all parties must act in good faith to build trust.