Emails being sent out when a document has been signed.

Hi, 

I was wondering if anyone can help me? Every time i send a document out for signature the person who is signing it recieves an email to say they have signed the document. I send multiple documents to the same person on a daily basis so as you can imagine this can be frustrating. I have contacted support many times but still can not resolve this issue. All of my notifications are unticked and my global settings is set to no one?

Thanks