Whenever any employer quits business, or sells out, exchanges, or otherwise disposes of the employer’s business or stock of goods, any premiums payable under this title shall become immediately due and payable, and the employer shall, within ten days, make a return and pay the premiums due; and any person who becomes a successor to such business shall become liable for the full amount of the premiums and withhold from the purchase price a sum sufficient to pay any premiums due from the employer until such time as the employer produces a receipt from the employment security department showing payment in full of any premiums due or a certificate that no premium is due and, if such premium is not paid by the employer within ten days from the date of such sale, exchange, or disposal, the successor shall become liable for the payment of the full amount of premiums, and the payment thereof by such successor shall, to the extent thereof, be deemed a payment upon the purchase price, and if such payment is greater in amount than the purchase price the amount of the difference shall become a debt due such successor from the employer. A successor may not be liable for any premiums due from the person from whom that person has acquired a business or stock of goods if that person gives written notice to the employment security department of such acquisition and no assessment is issued by the department within one hundred eighty days of receipt of such notice against the former operator of the business and a copy thereof mailed to such successor.