Okla. Stat. tit. 66, § 89
When the consignee or his agent is personally served with notice of the arrival of freight at or before five o'clock p.m., of any day, free time shall begin at seven o'clock a.m., of the day after such notice has been given. When such notice is given by mail twenty-four (24) hours' additional free time shall be allowed: Provided, however, that when such notice is given by mail, the consignee shall make oath that neither he, his agent, or employees have received such notice, then he shall not be deemed to have received legal notice by reason of having posted said notice by mail: Provided, further, that when consignors ship goods consigned to order, by and express in their bills of lading or shipping directions the name of the person at destination whom to notify, it shall be the duty of the railroad company to give such notice to such party in the same manner as if the shipment had been made directly to him.
R.L. 1910, § 1419.