In order to avoid any doubt, this should not automatically lead to the nullity of these acts, since the seller provides additional guarantees and does so without the consent of his spouse. This is only the case if the guarantees provided endanger “family interests”, which, in my opinion, will be quite extraordinary. The transaction must always be considered as a whole and, in the opinion of the latter, it must be determined whether the personal guarantees made available are disproportionate and are likely to endanger family interests. Finally, Article 224(1)(4) of the Belgian Civil Code protects only married persons, non-legal or real roommates. This means that sellers who are not married but cohabit legally or de facto do not need their partner`s consent. .