Synonyms of countersignature

1 Syllable

fiat

2 Syllables

backing, warrant, okay, favor, stroke, sanction

3 Syllables

approval, commercial, championing, permission, go-ahead

4 Syllables

affirmation, confirmation, advocacy, endorsement, signature, approbation, superscription, hubba-hubba

5 Syllables

recommendation, qualification, ratification