No renew emails sent

Hello,

I’m starting to work with a client’s existing site that uses AdRotate, which I’m unfamiliar with. The system currently sends out an email to advertisers whose ads are about to expire with a message to renew. The client no longer wants those emails to be sent, but I can’t find where to disable them.

Is this a feature of AdRotate or something else? If is AdRotate, how to disable?

Thanks much,

Philip