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Authorization for any product return must be obtained from Worthington Biochemical Corporation (Customer Service Department), or its authorized representative, prior to the return of product. This authorization is required to insure the proper return of material and, if applicable, the correct issuance of credit. There is no provision for credit of outdated material. Product must be returned in the same condition as received and within 30 days of the original shipment by Worthington Biochemical Corporation. A restocking fee may be charged for all returns.