delivered the opinion of the court:
This cause reaches us as an allowed petition for leave to appeal from a judgment of the First District Appellate Court (
Relator was a civil service employee of the city of Chicago for about ten years, during which he incurred heavy indebtedness, apparently largely due to the serious illness and subsequent death of his wife. As a result of his failure to pay his debts he was suspended from his employment for five days on March 5, 1962, but was not returned to duty until April 10, 1962. On May 22, 1962, he was again suspended for the same reason and subsequently discharged from his city employment. In a separate proceeding under the Administrative Review Act the circuit court determined his discharge to have been wrongful and directed his reinstatement.
It was stipulated that from March 5, 1962, to January 4, 1963, relator was employed by a liquor store at a gross salary of $105 per week; that the hours of this employment were from 5 :oo P.M. to 2 :oo A.M., and that these hours were not during the hours of relator’s city employment. During the period from April 11, 1962, to May 22, 1962, (the date of relator’s discharge) he performed his city duties and his services for the liquor store. There is no showing of the existence of any municipal ordinance or regulation prohibiting secondary or “moonlighting” employment of employees.
The defendant officials contend the courts erred in holding the monies earned in the liquor store employment should not be set off against the back salary. They further argue relator has not established a clear right to the writ of mandamus. Relator concedes that the right of setoff exists as to earnings by an employee during the period of wrongful discharge, but contends that this rule embraces only those earnings which would have been incompatible with the prior employment. The precise question for our consideration is, therefore, whether an employer who wrongfully discharges an employee is entitled to credit on a back-pay award for subsequent earnings of the employee from a secondary job, compatible with, and held by the employee in conjunction with, the principal employment.
We have previously and specifically held the employer entitled to set off the employee’s earnings from other employment against the salary accruing during the period he was improperly prevented from performing his duties. (Kelly v. Chicago Park District,
Defendants, in their argument, refer us to a number of other authorities including Corfman v. McDevitt,
The same inference is to be drawn from Atholwood Development Co. v. Houston,
The theory underlying a suit for back salary is to make the employee whole — to compensate him to the extent that the wrongful deprivation of salary has resulted in financial loss. For that reason the amount recoverable is to be reduced by his other earnings during the period of separation insofar as such income would have been incompatible with performance of his duties to his erring employer. But this does not necessitate mitigation of the recoverable salary by earnings compatible with and being received during the employment from which the employee is wrongfully discharged. There is in this record no hint of incompatibility between relator’s liquor store employment and his obligation to the municipality, either in the form of regulatory proscriptions or conflicting hours or duties. In fact, relator held both jobs for a substantial period of time prior to his wrongful discharge. As was aptly observed by the Appellate Court, the industrious holder of two compatible jobs who is wrongfully discharged from one should not be penalized by permitting the wrongdoer to deduct from the damages for which he is liable the earnings of the second job during the period of wrongful discharge.
Embraced in defendants’ argument is the contention that relator must establish his use of reasonable diligence to secure substitute employment before he may recover damages in the form of back salary, but we believe defendants misplace the burden. The defendants were here the wrongdoers, and the obligation to produce whatever proof' existed in diminution of damages rested on them. The overwhelming weight of authority, in this State and elsewhere in this country, is that an employer in an action for lost wages, must affirmatively show in order to reduce damages that the discharged employee could or did have other earnings subsequent to the wrongful discharge. (See cases collected in annotations in
Defendants’ final contention is that a mandamus action is an inappropriate remedy since the writ will not issue in the absence of a showing of a clear legal right thereto, and that the presence of an issue as to the amount due relator necessitated denial thereof. While relator maintains this defense was not raised in the trial court, and is not now available, we prefer to treat it on its merits.
The precise question here differs from that found in prior decisions of this court in which mandamus was held improper. An unreasonably extended opinion would result were we to analyze and distinguish each of the earlier cases, but it is apparent from a review thereof that mandamus was refused where a factual question existed or a separate determination of the basic rights was held necessary. Here we have no factual issue for determination since the amounts in question are either stipulated or undisputed. Relator’s right to reinstatement has been previously and finally adjudicated in a separate proceeding. The sole issue presented is one of law, and we hold it properly presented in this mandamus action. People ex rel. Blachly v. Coffin,
We therefore conclude the Appellate Court was correct in its judgment, which is accordingly affirmed.
Judgment affirmed.
