A security interest is not invalid or fraudulent against creditors by reason of liberty in the debtor to use, commingle or dispose of all or part of the collateral, including returned or repossessed goods, or to collect or compromise accounts or chattel paper, or to accept the return of goods or make repossessions, or to use, commingle or dispose of proceeds, or by reason of the failure of the secured party to require the debtor to account for proceeds or replace collateral. This section does not relax the requirements of possession where perfection of a security interest depends upon possession of the collateral by the secured party or by a bailee.
Mass. Gen. Laws ch. 106, § 9-205