On a German building site under the VOB/B, the standard construction terms, either party can demand a formal acceptance. Eine förmliche Abnahme hat stattzufinden, wenn eine Vertragspartei es verlangt. Both sides walk through the building together. Each may bring an expert. The result is written down, including known defects and the contractor’s objections. Public clients use a standard form, Formblatt Abnahme 442, which both sides sign immediately after the walk-through.