καθυπογράφω
From LSJ
τοῖς οἰκείοις συκοφαντίαν δέδωκεν → has given to his friends an opportunity for chicane, has offered to his friends the right of vindictive prosecution
English (LSJ)
A describe, Eust.974.13; append signature to a document or edict, Sammelb.5251.4 (ii B.C.), PFlor.36.22 (iv A.D.), Cod.Just.1.1.7.11, etc.
German (Pape)
[Seite 1290] = ὑπογράφω, Eust. u. a. Sp.
Greek (Liddell-Scott)
καθυπογράφω: ἐπιτεταμ. ἀντὶ τοῦ ὑπογ-, Εὐστ. Πονημάτ. 109, 52.