Oftentimes when a recordkeeper is being replaced, they will have your client sign on to their Adoption Agreement to enable them to service your account better since they are more familiar with the provisions. Included in this would be the appointment of a Trustee. Both the employer and the Trustees would need to sign this document. As with any Plan documents, a Board Resolution would accompany that and be signed by the appropriate people. Participants do not sign off on anything, however, as stated by others they must be notified and if there is any blackout period whereby they are not able to direct their investments (assuming it is participant directed), take a loan or a distribution (assuming these are available) then blackout notices must be provided indicating the time period that these will be unavailable and giving them the time to make changes or requests before the blackout begins.
