The day you hear the good news and believe in the one who came and died for you and rose from the grave. That is the day you are sealed with the Holy Spirit.

Ephesians 1:13,14

Ephesians 4:30

In the last days Satan will push his mark (counterfeit) on all the world

Revelations 13:16

God’s mark is the Holy Spirit

Satan’s mark is the counterfeit seal