If a default clause is misformed, landlords and tenants could get stuck in court for years and debate or pursue a case. Ineffective default clauses prevent a landlord from taking a defaulting tenant out of their property and finding a tenant who respects their agreement. Weak default clauses can allow a tenant to exploit his landlords by living in a property without being informed of the rent or properly caring for the property. A landlord may try to use all funds from a rental/security deposit that they keep against a tenant default like non-payment of rent. A lessor may apply for a court injunction obliging the tenant to comply with the obligations contained in his rental agreement. This may be appropriate if a landlord wants to ensure that the tenant acts from their premises at certain times.