An Auflassungsvormerkung is a priority notice in the land register that secures the buyer's claim to the property between signing and registration as owner. Because later sales, charges and even the seller's insolvency cannot defeat that claim, German closings are built so that the price falls due only once the notice is registered.
• The notary's written confirmation that the notice is registered, with only the encumbrances you accepted ranking ahead of it.
• Deletion approvals for every prior land charge, in the notary's hands before payment.
• A complete deed, with every side agreement recorded, so that the secured claim exists.
• In a forward purchase, a guarantee for the instalments paid.
• An agreed route to delete the notice if the contract is unwound, since deletion normally needs the buyer's approval (§ 19 GBO).