Rejecting
Have you taken a job, that you do not want to do, it is possible for you to give back the job by pressing "Reject". The job will then appear in the inbox of all addressees. You can enter an optional comment during the reject.
As returning of goods freshly purchased on a market should remain an exception the rejecting of jobs is only useful in exceptional cases and should not be used regularly as it is contrary to the principle of the Marketplace.