Summary: Where a claim for the cancellation of lease agreements, and the eviction of the tenants, is based only on the terms of the agreements, and not on the title of the lessor, the court of the tenants’ domicile, and of the place where the contracts were concluded, has concurrent jurisdiction with that of the forum rei sitae. Ignorance of a term of the leases entitling the lessor to cancel in the event of a surety’s sequestration not a justus error on the facts.