For those that have died the die has been cast. They either died as believers in the certainty of forgiveness, redemption and salvation unto eternal life through faith in the Christ and His atoning work of sacrifice, in which case nothing more needs to be or can be said or done, or not. For those yet living, including myself, prayers addressed to the Father in the name of His Son (who told us that no man comes to the Father but through him), are ever needful and quite appropriate.
It is finished!! Words to remember, and to live and die by.
AMEN!