LSJ
Dor. aor. inf. διαψαφίξαι, put to the vote, τὰν γνώμαν IG 12(3).249.38 (Anaphe); δ. τοὺς φόρους keep account of tribute, of the rationales, Lyd. Mag. 3.46. more freq. Dep. διαψηφίζομαι, Att. fut. -ιοῦμαι, vote by ballot, Antipho 5.8, Hyp. Eux. 40, etc. ; δ. περὶ δίκης Pl. Lg. 937a; δ. κρύβδην, κρύφα, And. 4.3, Th. 4.88.
decide by vote, τι Lys. 26.1; ταύτῃ διαψηφίσασθε v.l. in D. 28.23. Pass., διαψηφισθεὶς εἰ γνήσιός ἐστι Lib. Decl. 16.29.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)