While doing the back link analysis of the link profile for removing inorganic or bad links you will find many pages where link is not found and it can be of following type:
- Domain Expired and Ads Page is appearing.
- Site is offline and Page not found status.
- Page is redirected to some other website or page.
- The page content are changed and now showing your link
- It is showing some search page
In such circumstances your links is offline and the question arises
- Should you send a mail to site owner for removal? – NO USE
- Should you Leave it without doing any action? – Think
- Should you include the URL or domain in Disavow file? – Yes
Most of webmaster/SEO will advocate not to do anything with such links and no need of even disavow it. I have different opinion it is better to be safe and include in disavow file to prevent damages that might comes in future in the page is activated and link reappears.