Stopping email notifications for one signatory

Hello,

I issue lots of contracts for signature - they go to my colleague first to sign, and then to the external party. I would like to still receive email notifications, but I would like my colleague to not receive any email notifications at all. Ideally, they should just log into Adobe Sign when they have time to sign some contracts, sign the ones waiting under 'waiting for you' and then log out again when they are done.

This colleague isn't issuing any contracts, just signing them, so I don't think changing their notification settings will work.

Is this possible?

Many thanks!