Vouch

вызыва́ть в суд

vyzyvátʹ v sud

(to summon (someone) into court to establish a warranty of title to land)

дава́ть показания

davátʹ pokazanija

(to bear witness or testify)

подтвержда́ть

podtverždátʹ

(to back, confirm, or support (someone or something) with credible evidence or proof)

ручаться

ručatʹsja

(to affirm or warrant the correctness or truth of (something); also, to affirm or warrant (the truth of an assertion or statement))