The "double treble clef" insignia is the official corporate insignia of Sweet Adelines International. It is the exclusive insignia to be used to represent the organization. The name "Sweet Adelines International" and the insignia are registered with the U.S. Patent and Trademark Office. When the insignia is used on articles other than official printed material, the exact symbol must be used without modification of any kind and may appear in any solid color on any solid background. Sequins and metallic are considered solid when all one color. When used for jewelry items, the logo may be gold or silver and stones may be any solid color.

The type face for "Sweet Adelines International" is Times Roman, and the style is large and small capital letters. When used in conjunction with the "double treble clef" symbol, the words should appear in this type face and style, stacked in two lines and centered under the symbol whenever possible. When the corporation's name, "Sweet Adelines International" or "Sweet Adelines," is used without the insignia, it should not appear in script typeface. The "double treble clef" symbol shall not be modified or integrated with another symbol.

If a Sweet Adelines International member, quartet, chorus, region, or area wishes to use the double treble clef symbol or logo as well as its own quartet, chorus, regional, or area symbol, on its stationery or other items, the two insignia should be separated by sufficient space so that they do not appear to be a composite symbol.

Sweet Adelines International may grant a non-exclusive license to members and nonmembers to use the registered trademark commonly known as the "double treble clef," the name "Sweet Adelines International," and/or any of the corporation's official insignia on products created for sale to members of Sweet Adelines International. Permission and design approval must be obtained from the Director of Communications at international headquarters if the items on which the symbol, logo and/or name appear are offered for sale.