Mass. Gen. Laws ch. 106, § 9-620
(a) Conditions to acceptance in satisfaction. Except as otherwise provided in subsection (g), a secured party may accept collateral in full or partial satisfaction of the obligation it secures only if:
(2) the secured party does not receive, within the time set forth in subsection (d), a notification of objection to the proposal authenticated by:
(b) Purported acceptance ineffective. A purported or apparent acceptance of collateral under this section is ineffective unless:
(c) Debtor's consent. For purposes of this section:
(2) a debtor consents to an acceptance of collateral in full satisfaction of the obligation it secures only if the debtor agrees to the terms of the acceptance in a record authenticated after default or the secured party:
(d) Effectiveness of notification. To be effective under subsection (a)(2), a notification of objection must be received by the secured party:
(2) in other cases:
(e) Mandatory disposition of consumer goods. A secured party that has taken possession of collateral shall dispose of the collateral pursuant to Section 9–610 within the time specified in subsection (f) if:
(f) Compliance with mandatory disposition requirement. To comply with subsection (e), the secured party shall dispose of the collateral: