Since Lord Caitanya is especially merciful to innocent, unsophisticated persons, His name is also Patita-pāvana, the deliverer of the most fallen conditioned souls. Although a conditioned soul may be fallen to the lowest position, such a lowly state will not prevent him from advancing in the spiritual science, provided he is innocent. Sanātana Gosvāmī was considered fallen in society because he was in the service of the Muslim government and had thus been excommunicated from brahminical society. But because he was a sincere soul, Lord Caitanya showed him special favor by granting him a wealth of spiritual information.
(Teachings of Lord Caitanya).

In the Malabar district, a section of the brāhmaṇas are known as Nambudari brāhmaṇas, and the Bhaṭṭathāris are their priests. Bhaṭṭathāris know many tantric black arts, such as the art of killing a person, of bringing him under submission, and of destroying or devastating him. They are very expert in these black arts, and one such Bhaṭṭathāri bewildered the personal servant of Śrī Caitanya Mahāprabhu while the servant accompanied the Lord in His travels through South India. Somehow or other Śrī Caitanya Mahāprabhu delivered this Kṛṣṇadāsa from the clutches of the Bhaṭṭathāri. Śrī Caitanya Mahāprabhu is well known as Patita-pāvana, the savior of all fallen souls, and He proved this in His behavior toward His personal servant, Kṛṣṇadāsa, whom He saved. Sometimes the word Bhaṭṭathāri is misspelled in Bengal as Bhaṭṭamāri.
(Sri Caitanya Caritamrta).

The devotees of the Lord understand that it is māyā's influence that has spoiled the people and made them demoniac. Thus the inherently noble disposition of the devotees leads them to think only of the demons' benefit, without a tinge of envy. The devotees are therefore known as patita-pāvana, "the saviors of the fallen." In fact, the devotees are more compassionate than the Supreme Lord Himself. Of course, it is the Supreme Lord's grace alone that makes them more compassionate than the Lord. And by the mercy of such devotees, the lowest sinful men and women can attain the lotus feet of the Lord.
(Renunciation through Wisdom).