Are the husband's parents entitled to inform the wife's family that the apartment does not belong to the husband and he has no right to dispose of it?

The husband's family may inform the wife's family that the marital apartment is not owned by the husband if it is not, in fact, his property. However, if it is his property, they are not permitted to lie. It is not a condition for him to own the property; rather, it suffices for him to own its usufruct (right to use).