For purposes of section 3(2)(a) read with section 3(3)(a) of ILPACOSA, a debt is not regarded as being due until the creditor has knowledge of the identity of the organ of state and of the facts giving rise to the debt, and a creditor must be regarded as having acquired such knowledge as soon as they could have acquired it by exercising reasonable care. Where a creditor only becomes aware through legal consultation that they have a claim at all, the six-month notice period runs from the date of obtaining that knowledge, not from the date of the wrongful act. Technical defects such as typographical errors in the date on statutory notices do not invalidate compliance where the substance of the requirement has been met (proper content, timeous dispatch and receipt) and no prejudice results. Applications under section 3(4) of ILPACOSA are for permission to enforce a right, not condonation for non-observance of court procedure, and this distinction is relevant to the approach to costs.