Śrī Vibhīṣaṇāzhvān holds a place of unique honour in the Śrī Vaiṣṇava tradition as the archetype of unconditional surrender (śaraṇāgati) and as the chief illustration of paragata svīkāram — the principle that it is ultimately Bhagavān's own will and grace that effect the acceptance of the surrendered soul, not any merit or qualification of the devotee.
The narrative of Vibhīṣaṇa's surrender in the Rāmāyaṇa (Yuddhakāṇḍa) is a subject of deep theological meditation among the Āchāryas. When Vibhīṣaṇa flew across the ocean and presented himself before Śrī Rāma's army, many of Rāma's counsellors urged caution — how could one trust the brother of the enemy? Śrī Rāma, however, declared with divine certitude: 'I shall never abandon one who has surrendered to Me — be he even a sinner. This is My vow.' (sakṛd eva prapannāya). The Āchāryas point out that Rāma did not examine Vibhīṣaṇa's credentials; the very act of coming with surrender (āgato'smi) was sufficient. Bhagavān accepted him, protected him, and — fulfilling the full arc of the Rāmāyaṇa — crowned him king of Laṅkā.
In the theology of Śrīvacana Bhūṣaṇam and the teachings of Piḷḷai Lokācārya, Vibhīṣaṇa's case establishes that origin, past, and worldly status are irrelevant before Bhagavān's compassion. A rākṣasa by birth, dwelling in the camp of Bhagavān's adversary — yet he is accepted without hesitation. This is the ground on which the Āchāryas build the doctrine that in prapatti the burden of acceptance rests entirely with Bhagavān, and the prapanna's only task is to arrive with sincerity. Vibhīṣaṇa is thus held as a perennial model for all seekers who feel unworthy of grace.