In this Part -
"additional debt" in relation to a relevant person who has received a notice of attachment in respect of an overpaid person, means any amount which, at any time after the time of the receipt by the relevant person of the notice of attachment but before the end of the relevant period in relation to the notice, would be a debt due by the relevant person to the overpaid person if a notice of attachment were received by the relevant person at that time;
"debt" in relation to a notice of attachment given to a relevant person in respect of an overpaid person and in relation to that relevant person and overpaid person, means the amount of any money which, at the time the notice of attachment is received by the relevant person, is due by the relevant person (whether on that person’s own account or as an agent or trustee) to the overpaid person, irrespective of whether the overpaid person has applied for the payment (to the overpaid person or any other person) or for the wi
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