Do I need to verify my site on webmaster both with and without the "www." at the start?

[mgane]

As per title, is it necessary to verify a site on webmaster twice, with and without the "www"?

I only ask as I'm about to submit a disavow request, and have just read this:

NB: Make sure you verify both the http:website.com and http://www.website.com versions of your site and submit the links disavow file for each.  Google has said that they view these as completely different sites so it’s important not to forget this step. (here)

Is there anything in this? It strikes me as more than a bit odd that you need to submit a site twice.

[Chris.Menke]

In GWT, if you tell Google that you have a preferred domain (www or non www) it will require that you verify both versions.  You're not able submit a disavow file for a domain that you have not been verified for, so if you have links pointing to non-www, you need to be verified for that domain before you can submit your disavow file for it--and vise versa.

[mgane]

Thanks, Chris. Do I need to tailor the disavow request for each version? i.e. only links that point to our domain with the www subdomain in one list and non www in a separate list?

[Chris.Menke]

Yes, that's generally considered the correct way of doing it if you have links to both www and non-www.