In the event that there is an introduction of a Temporary Worker to the Client which does not result in the supply of that Temporary Worker to the Client, but that leads to an Engagement of the Temporary Worker for a definite or indefinite period by the Client either directly or pursuant to being supplied by another Agency within 12 months from the day after the Temporary Worker last worked for the client or the date of introduction or interview, the Client shall be liable to an introduction fee calculated as above. No refund of the introduction fee will be paid in the event that the Engagement subsequently terminates.