The Lord tried to conceal His identity as the Supreme Personality of Godhead by representing Himself as a devotee, but His pure devotees could recognize Him by His special features. The Vedas and Purāṇas foretell the appearance of Lord Caitanya, but still He is sometimes called, significantly, the concealed descent of the Supreme Personality of Godhead.
Recognize (CC and Other Books)
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 1.37, Purport:
By accepting the six Gosvāmīs as his instructing spiritual masters, the author specifically makes it clear that one should not be recognized as a Gauḍīya Vaiṣṇava if he is not obedient to them.
CC Adi 1.62, Translation:
"Saints are My heart, and only I am their hearts. They do not know anyone but Me, and therefore I do not recognize anyone besides them as Mine."
CC Adi 3.78, Purport:
Lord Śrī Caitanya Mahāprabhu is the father and inaugurator of the saṅkīrtana movement. One who worships Him by sacrificing his life, money, intelligence and words for the saṅkīrtana movement is recognized by the Lord and endowed with His blessings. All others may be said to be foolish, for of all sacrifices in which a man may apply his energy, a sacrifice made for the saṅkīrtana movement is the most glorious.