Conn. Gen. Stat. § 52-341: Attachment of debt evidenced by negotiable note.

When a debt evidenced by a negotiable promissory note has been attached by process of foreign attachment and the defendant has had actual notice thereof, he shall not negotiate or transfer such note during the continuance of the attachment lien; and, if he does so, he shall be guilty of fraud upon the attaching creditor, who, if he recovers judgment in his original suit, may, within one year after its rendition, institute a civil action against the defendant for such fraud; but the title of any bona fide purchaser of such note for valuable consideration, without notice and before maturity, shall not be affected by the provisions of this section.