A sum payable upon a contingency is not a debt, nor does it become a debt until the contingency happens. (Doland v. Clark, 143 CA 176) The service of a garnishment on the tenant of rental property to pay the rental obligation to the levying officer instead of a landlord requires two factors:
That is to say if the rental agreement indicates payment is due on the 1st of every month, the service of a garnishment must be made on or after the 1st of the month. Service of the garnishment prior to the obligation is not valid.
Except for a court ordered assignment, California law does not exist dealing with the question of whether installments of rent due in the future is subject to garnishment. The obligation to pay future installments of rent is generally dependent upon the continuance of possession and enjoyment of the premises. Since it cannot be determined prospectively whether there will be any interference with that possession, the obligation of the tenant’s future rental payments to the landlord cannot be garnishment. Future rents are so speculative as not to qualify as debts certain to be due, or even as debts at all and hence are not garnishable. (Hustead v. Superior Court, 2 CA 3d 780)