First post so aplogies in advance if I have done it wrong.

I'm sure I have seen this done but can't figure it out.
I have a document which has a "Company Name" on the front cover and when that text is updated I want all instances of "Company Name" in the document to update.
I will be giving the document to others so need a foolproof way, preferably automatic.
(find and replace is out as not all users will be savvy enough) .

Thanks in advance for any help.