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

Erfüllungsgeschäft

Substantiv

full

legally consequential act discharging an obligation

Comparative law notes

Switzerland

This is a rather cumbersome neologism, but it accurately conveys the essence of this concept: a party engages in a legally consequential or juridical act (Rechtsgeschäft) in order to discharge an obligation that was created through a prior Rechtsgeschäft.