Four Kinds of Saranagati

He who accepts God (Krishna / Narayana) as his sole (only) refuge= prapannan is Saranagati

1. Ukti Nishta: The qualified aspirant receives a mantra from the Guru and surrenders to Bhagavan.
2. Suva Nishta: This is Self surrender by pure souls without outside help from Guru or Acharya. One example is Ramanujacharya. These are highly evolved souls.
3. Acharya Nishta: Here Surrender is obtained through Acharya who worships Bhagavan by chanting Mantra on behalf of the aspirant.
4. BhAgavata Nishta: Tried and true devotees of Bhagavan can introduce the aspirant to Bhagavan and implore Saranagata Raksa (surrender protection) on behalf of the aspirant.

The beauty about Saranagatti/Prapatti Raksa is there is no bar on any one based on external inequities.