All the incarnations of the Lord are mentioned in the revealed
scriptures. There is no scope for an imposter to become an incarnation, for he must be mentioned in the sastras. An incarnation does not declare Himself to be an incarnation of the Lord, but great sages agree by the symptoms mentioned in the revealed scriptures. The features of the incarnation and the particular type of mission which He has to execute are mentioned in the revealed scriptures. - SB 1.3.5
scriptures. There is no scope for an imposter to become an incarnation, for he must be mentioned in the sastras. An incarnation does not declare Himself to be an incarnation of the Lord, but great sages agree by the symptoms mentioned in the revealed scriptures. The features of the incarnation and the particular type of mission which He has to execute are mentioned in the revealed scriptures. - SB 1.3.5