Conn. Gen. Stat. § 33-680: Surrender of share certificates.

The board of directors of a corporation may, from time to time, for any proper purpose, require shareholders to surrender their share certificates in exchange for new certificates, or for the entering thereof of an appropriate legend or notation, and may take reasonable measures to enforce such requirement. Without limiting the generality of the foregoing, the board of directors of the surviving corporation in a merger, or of a corporation the certificate of incorporation of which has been amended, may require shareholders holding share certificates which do not reflect such merger or amendment to surrender the same in exchange for new certificates, or for the entering thereon of an appropriate legend or notation, and may, after written notice thereof to such shareholders, refuse to pay dividends or make other distributions in respect of unsurrendered certificates, but in such case such dividends and distributions shall be accumulated for the benefit of the holders thereof, but with interest, until such certificates are so surrendered.