Okla. Stat. tit. 12A, § 12A-2-327: Special Incidents of Sale on Approval and Sale or

Return.

(1) Under a sale on approval unless otherwise agreed

(a) although the goods are identified to the contract the

risk of loss and the title do not pass to the buyer until

acceptance; and

(b) use of the goods consistent with the purpose of trial

is not acceptance but failure seasonably to notify the seller of

election to return the goods is acceptance, and if the goods conform

to the contract acceptance of any part is acceptance of the whole;

and

(c) after due notification of election to return, the

return is at the seller's risk and expense but a merchant buyer must

follow any reasonable instructions.

(2) Under a sale or return unless otherwise agreed

(a) the option to return extends to the whole or any

commercial unit of the goods while in substantially their original

condition, but must be exercised seasonably, and

(b) the return is at the buyer's risk and expense.