Md. Code, Commercial Law § 2–326

(1) Unless otherwise agreed, if delivered goods may be returned by the buyer even though they conform to the contract, the transaction is

(a) A “sale on approval” if the goods are delivered primarily for use, and

(b) A “sale or return” if the goods are delivered primarily for resale.

(2) Goods held on approval are not subject to the claims of the buyer’s creditors until acceptance; goods held on sale or return are subject to such claims while in the buyer’s possession.

(3) Any “or return” term of a contract for sale is to be treated as a separate contract for sale within the statute of frauds section of this title (§ 2-201) and as contradicting the sale aspect of the contract within the provisions of this title on parole or extrinsic evidence (§ 2-202).