2 Chronicles 21:12
12 And there came a writing to him from Elijah the prophet, saying, Thus saith the LORD God of David thy father, Because thou hast not walked in the ways of Jehoshaphat thy father, nor in the ways of Asa king of Judah,
How could Elijah have sent a letter long after his departure into heaven?
PROBLEM: When Jehoram became king in Judah, “he made high places in the mountains of Judah, and caused the inhabitants of Jerusalem to commit harlotry, and led Judah astray” (2 Chronicles 21:11). In 2 Chronicles 21:12, we find that, in response to Jehoram’s sin, Elijah sent a letter to Jehoram. However, if Elijah was translated prior to the reign of Jehoram the son of Jehoshaphat, then how could he have sent a letter to Jehoram?
SOLUTION: Elijah was not translated until some time during the reign of Jehoram son of Ahab. Jehoram son of Ahab reigned in Israel from about 852 to 841 B.C. Jehoram son of Jehoshaphat reigned in Judah from 848 to 841 B.C. Therefore, since Elijah was not translated until some time in the reign of Jehoram of Israel, it is perfectly reasonable that he could have sent this letter to Jehoram of Judah.