February 21. On this date in 1942, a letter addressed to an individual believer on behalf of Shoghi Effendi clarified that "Bahá'u'lláh never revealed a Tablet to the President of the U.S.A. In His Book the Aqdas He revealed words addressed to the Presidents of the Republics of the Americas, but no single Tablet was ever revealed to any one of them" and that "The Tablet of Joseph does not refer to Joseph Smith. Joseph Smith we do not consider a Prophet, minor or otherwise. Certainly no references he made would have foretold the coming of this Revelation in his capacity as a Prophet."

February 21. On this date in 1942, a letter addressed to an individual believer on behalf of Shoghi Effendi clarified that "Bahá'u'lláh never revealed a Tablet to the President of the U.S.A. In His Book the Aqdas He revealed words addressed to the Presidents of the Republics of the Americas, but no single Tablet was ever revealed to any one of them" and that "The Tablet of Joseph does not refer to Joseph Smith. Joseph Smith we do not consider a Prophet, minor or otherwise. Certainly no references he made would have foretold the coming of this Revelation in his capacity as a Prophet."

1610. Tablet to the Presidents of the Republics of the Americas
"Bahá'u'lláh never revealed a Tablet to the President of the U.S.A. In His Book the Aqdas He revealed words addressed to the Presidents of the Republics of the Americas, but no single Tablet was ever revealed to any one of them."
(From a letter written on behalf of Shoghi Effendi to an individual believer, February 21, 1942) 

1611. Tablet of Joseph
"The Tablet of Joseph does not refer to Joseph Smith.
"Joseph Smith we do not consider a Prophet, minor or otherwise. Certainly no references he made would have foretold the coming of this Revelation in his capacity as a Prophet."
(Ibid.)

The Bahá’í notion of progressive revelation exlcudes many key figures who have generated significant religious movements, whether in the distant past like Confucius or in the 19th Century like Mirza Ghulam Ahmad and Joseph Smith. All religious founders are not universally accepted as prophets.

The following is the excerpt from the Aqdas addressed to the Presidents of the Republics of the Americas...

Hearken ye, O Rulers of America and the Presidents of the Republics therein, unto that which the Dove is warbling on the Branch of Eternity: ** “There is none other God but Me, the Ever-Abiding, the Forgiving, the All-Bountiful.”** Adorn ye the temple of dominion with the ornament of justice and of the fear of God, and its head with the crown of the remembrance of your Lord, the Creator of the heavens. ** Thus counselleth you He Who is the Dayspring of Names, as bidden by Him Who is the All-Knowing, the All-Wise. The Promised One hath appeared in this glorified Station,** whereat all beings, both seen and unseen, have rejoiced. Take ye advantage of the Day of God. Verily, to meet Him is better for you than all that whereon the sun shineth, could ye but know it. O concourse of rulers! Give ear unto that which hath been raised from the Dayspring of Grandeur: “Verily, there is none other God but Me, the Lord of Utterance, the All-Knowing.” Bind ye the broken with the hands of justice, and crush the oppressor who flourisheth with the rod of the commandments of your Lord, the Ordainer, the All-Wise.