How long should it take to receive a check after signing a refunding bond and release?

My mother is due to receive a check for the settlement of an estate. This attorney who was the executor and handling the estate took four years to track down the beneficiaries (actually one of the beneficiaries did it for him). He recently sent out the Refunding Bond and Release form which we have returned to his office certified mail. When I questioned how long it would take to receive the check, the attorney stated that he needed all the refunding bond documents from all beneficiaries returned before releasing the check. Can you tell me if that statement is accurate? He already stated the amount she would be receiving so I'm a little confused why he needs to wait for everyone else's forms. Thanks for any info you can give me.