Standard Change notification spam in when changing phase

Hello,

Our users are receiving a confusing notification with the text:    Your submitted request SD###### <"&action=&title=Interaction null&queryHash=2c61b6a0" target="_blank">http://localhost/index.do?ctx=docEngine&file=incidents&query=number="null"&action=&title=Interaction null&queryHash=2c61b6a0> is pending your input for fulfillment. Please provide your input when possible.

we would like to remove this becsue it is not required for our workflow but have not been able locate the source of the notifications. Has anyone seen this before and what can we do to disable it?

Thanks.