I would like to change my site aaa.com to aaa.net by using a 301 redirect. Do I have to contact all my advertiser regarding the change for permission? for example, text-linked-ads, affiliate program, and my ad on adwords. In their platform, do they still see aaa.com (so I don't need to ask them for permission), or aaa.net (so I have to discuss with them)? anyone with the same experience, thanks very much for your help.
If you would like to drop the .com address finally then yes, if you have made the changes please contact all your advertisers to update the links.