No subsequent attaching creditor or purchaser of property attached, other than parties to the record, shall be bound by an amendment of the pleadings which substantially affects his rights unless he has had due notice of the motion for leave to amend and unless he has had an opportunity to be heard thereon. Such persons shall also have the right of appeal.
Mass. Gen. Laws ch. 231, § 138
Amendment of pleadings; notice and hearing requisite to bind certain persons; appeal
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.