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“Joint and several liability” is where two or more persons are liable in respect of the same liability.

Under joint and several liability or all sums, a claimant may pursue an obligation against any one party as if they were jointly liable and it becomes the responsibility of the defendants to sort out their respective proportions of liability and payment.

This means that if the claimant pursues one defendant and receives payment, that defendant must then pursue the other obligors for a contribution to their share of the liability.

This obligation is normally spelled out in a lease clause, in leases which are signed by two or more tenants.


http://www.landlordology.com/what-is-joint-and-several-liability/