The first review should bring together the current Firmenbuch extract, the complete draft agreement and a clear description of the business. The extract confirms the registered name. The agreement must show whether and how the related business is included as an acquisition object.
Trademark and domain documents should be collected in separate entries. They should identify the relevant object, its registration or contractual allocation and whether the buyer is intended to receive it. A joint checklist is useful, but it must preserve the separate legal allocation.
Before signing, prepare a short comparison of what the buyer receives under the agreement and what remains with the seller. If that comparison shows only a business name without the related business, the empty transfer is a central unresolved contract issue.