What is a care-of address used for in a trademark application?

A care-of address in a trademark application is specifically used to receive mail on behalf of another person. This means that if the applicant is not able to receive correspondence at their primary address, they can designate a care-of address where the correspondence can be sent. This is often used when the actual owner of the trademark is represented by an attorney or a different entity, providing a point of contact for communication regarding the trademark application.

The options that do not align with the function of a care-of address are less precise in their application. While receiving advertisements and promotions may seem relevant, it is not its intended use in a formal trademark application context. Additionally, while a backup mailing option could serve a purpose, it does not capture the specific reason for designating a care-of address, which is focused on ensuring that communications regarding legal matters and trademark updates reach the appropriate party. Submitting legal documents is a separate process and is not facilitated by a care-of address but rather through official filings with the USPTO.