A Letter of Agency (LOA) is a document authorizing a telecommunications provider to act on a consumer's behalf. Some vendors may also call this a Letter of Authorization, however this is an incorrect name and Letter of Agency is the official term used in FCC documentation and Federal Statute.
A document authorizing a telecommunications provider to act on a consumer's behalf is sometimes called a Letter of Authorization, but this is incorrect and "Letter of Agency" is the official term used in FCC documentation and Federal Statute.