पक्षानुमतौ वा द्वौ ऋणं प्रति न त्वेवैकः ॥ कZ_०३.११.२७ ॥
pakṣānumatau vā dvau ṛṇaṃ prati na tvevaikaḥ
Or, if both parties consent, two witnesses may suffice for a debt claim—but never a single witness.
It allows efficiency through party consent (two witnesses) while maintaining a strict anti-fraud floor (no single-witness proof).