On LinkedIn you must have an email address with the company as the domain name to create or edit that company’s page. On Facebook you are asked if you have the legal right to the name you are creating or permission from someone with the legal right to the name, but it doesn’t require any proof. If you create a company page for a company you don’t own, they can have the page deleted.
Having an official page in both places can benefit your company, you need to be where ever anyone is searching for you. Both of these sites have changed considerably in the last year, so if you’ve previously dismissed them, you might want to take another look.
Where else can a company have a page?