The official Kappa Kappa Gamma signature is "Loyally," followed by a drawing of the fraternity New Member pin, a sigma within a delta. When I email my sisters, I sometimes sign it "Loyally delsigmata" (a sigma within a delta...I made that one up myself and got everyone else on campus to start using it too
) since the actual symbol takes too much time to draw on a computer. Informal letters are usually just signed "Love" or "Love and Loyalty" (L and L)