German company law (GmbHG §15) requires almost every change to a GmbH or UG share capital, issuances, transfers, capital increases, share-class amendments, to be witnessed by a German Notar (a state-licensed civil-law notary), recorded in a notarial deed (Urkunde), and filed with the Handelsregister. The notary's fee scales with the deal value (capped at the 'Notarkostentabelle' rates), typically running €1k to €5k for routine cap-table events and €10 to 30k+ for large priced rounds.
This friction is the main reason German startups use VSOPs (cash-settled phantom options) instead of real share grants for employees, structure secondary sales as bundled events to amortise notary fees, and prefer GmbH over UG for venture rounds despite the higher capital requirement. Cross-border investors are often surprised that a small bridge round in Germany costs notary fees that simply don't exist in a Delaware C-Corp.