Letterhead notice. A letter on a company's letterhead or other piece of paper that clearly shows the company name from a company representative with signature authority. A letterhead notice does not require approval by TTB prior to the change.
27 CFR § 19.1
As used in this part, the following terms shall have the meanings indicated unless either the context in which they are used requires a different meaning, or a different definition is prescribed for a particular subpart, section, or portion of this part: