(1) A person who makes a payment to the Commonwealth in compliance with a garnishee notice is taken to have made the payment under the authority of the original debtor and of any other person concerned.
(2) If, after a garnishee notice is given to a garnishee, an amount is paid by another person in reduction or in satisfaction of the original debt:
(a) the Secretary must notify the garnishee accordingly; and
(b) the amount of the unpaid debt stated in the garnishee notice is taken to be reduced by an amount equal to the amount paid.