Any owner of hens against whom any assessment is made and deducted under authority of this article, if dissatisfied with said assessment, shall have the right to demand and receive from the treasurer of the certified association a refund of the amount of the assessment collected from such seller of hens, if such demand for refund is made in writing within 30 days from the date on which such assessment was deducted from the sale price of hens sold. Applications for refunds of amounts deducted from such sale price must give the name and address of the purchaser of the hens, date of purchase, invoice number, if any, and the number of hens purchased from him for which the assessment was deducted. Within 30 days after the receipt of such application, the certified association shall, after such association determines that the assessment was paid as claimed in the application, refund the amount so paid as an assessment. The mailing by the association of a valid check in the amount of such assessment, payable to the seller, within 30 days after receipt of the application for refund, shall constitute a compliance with this section.