Black's Law Dictionary (2nd edition)dictionaries

On Call

There is no legal difference between an obligation payable “when de-manded” or “on demand” and one payable “on call” or “at any time called for.” In each case the debt is payable immediately. Bowman v. McCheeuey, 22 Grat (Va.) 609

Source: Black’s Law Dictionary 2nd Ed (1910)