Can a second name appear on the bill for an existing account member?

I want my father-in-law's name added as a secondary name on my Xfinity bill. He's already listed as a member on my account.

I spoke with support and was told this is all set, but I'd like to confirm before I rely on it. Two questions:

1. Does Xfinity actually support a second name printed on the bill, or is that separate from account member status?
2. If it is supported, how can I verify it's set up correctly on my end?

Thanks in advance.