I have a free wordpress blogging account and I have a domain from GoDaddy which is forwarding to my wordpress blog. I want to use Google's sitemap which requires me to add the meta tag in my wordpress page.
In Google Webmaster tools or Yahoo's, if I use mysite.wordpress.com and get the meta tag in the blog, it works, but if I use my domain name like mysite.com, then it doesn't get verified. How come?
This is because you're only forwarding the domain. It's not actually the domain of your blog, just a simple link. If you want it to really work you should register your domain as a paid domain in wordpress (it costs like 10$ a year), and then it will work. That's what I did, and I'm pretty happy with the results.