In Vietnam, when a property has multiple registered owners (as shown on the Land Use Rights Certificate, or "Red Book"), the law requires unanimous consent from all co-owners for leasing activities. If one owner signs a lease contract without the consent or power of attorney from the other(s), the contract may be considered legally invalid. Key Consequences of invalid leasing contract: ✅ 1. The lease may be declared null and void The contract can be challenged by the non-signing co-owner(s) Authorities (such as the Department of Planning and Investment) may refuse to accept the lease for purposes like FDI company registration ✅ 2. Rejection of company registration or licensing For FDI enterprises using the leased address as a registered office, an invalid lease can cause: Rejection of the Investment Registration Certificate (IRC) Delays or failure in Enterprise Registration Certificate (ERC) processing ✅ 3. Legal disputes and compensation risks The non-consenting co-owner may initiate a civil lawsuit The tenant may be forced...