1669 Ld. Orrery VI. vi. viii. 297 I will not scruple to put that to a tryal, where you are Party-Witness, and Judg.
1829 J. Bentham 33 Say accordingly party-witnesses, or testifying parties.
1994 24 40/1 (table) Opposite party witness.
2002 (Nexis) 1 Apr. 28 The objectants have moved for an order compelling a party-witness to appear for an examination pursuant to a subpoena.