No claim to abatement or remission of revenue, unless the same shall have been allowed by the authority of Government, and no private demand or cause of action whatever, held or supposed to be held by any defaulter against Government, shall bar or render void or voidable a sale under this Act; nor shall the plea that money belonging to the defaulter, and sufficient to pay the arrear of revenue due, was in the Collector's hands, bar or render void or voidable a sale under this Act, unless such money stand in the defaulter's name alone and without dispute, and unless, after application in due time made by the defaulter, or after the written agreement provided for in Section XV of this Act, the Collector shall have neglected, or refused on insufficient grounds, to transfer it in payment of the arrear of revenue due.