There are multiple definitions - click on the translation that matches your context.

Gutglaubensschutz

Substantiv

partial

good faith

noun

Comparative law notes

Switzerland

German concept is more of an equitable defense doctrine based on good faith reliance.

Definitions of good faith

English

if a transaction is carried out in good faith then it is carried out with no intention to defraud or act dishonestly

He accused the unions of failing to act in good faith and of rejecting every proposal proffered.

English

something done with good intentions, without knowledge of fraudulent circumstances or reason to ask any particular questions (eg about the legitimacy of a deal)

After all, Your Honor, my client paid for the DVD player in good faith.