C3O1U1N1T1E1R1S1I1G2N1I1N1G2
18 points
COUNTERSIGNING is validvalid
COUNTERSIGN, [v]
COUNTERSIGN, to sign with a signature attesting the authenticity of a document already signed by another [v]
COUNTERSIGN, [v]
COUNTERSIGN, to sign with a signature attesting the authenticity of a document already signed by another [v]