Final answer:
The option that is NOT a legal notice is an email from a friend, as legal notices include public notices, notices of foreclosure, and some newspaper advertisements, depending on context.
Step-by-step explanation:
Among the given options, the one that is NOT a legal notice is an email from a friend. Legal notices typically include public notices, such as governmental announcements or regulations, notice of foreclosure, which is a legal process where a lender attempts to recover the balance of a loan from a borrower who has stopped making payments, by forcing the sale of the asset used as the collateral for the loan.
Finally, advertisements in a newspaper can also serve as legal notices, depending on the context, such as publicizing the intent to change one's name or a business's application for a liquor license. However, an email from a friend is informal and does not constitute a legal notice.