Kautilya's Arthashastra 3.12.38

3.12.38

karaṇahīnaṃ nikṣepam apavyayamānaṃ gūḍhabhittinyastān sākṣiṇo nikṣeptā rahasi praṇipātena prajñāpayet, vanānte vā madyaprahavaṇaviśvāsena //

When a depositary denies having received a sealed deposit which was not, however, deposited for any reasonable cause, the depositor may obtain secret permission (from the judges) to produce such witnesses as he might have stationed under a wall (gúdhabhitti) while depositing.