⚠️ Deprecated: This endpoint is deprecated. Use the External Accounts API instead — GET /v1/customers/{customer_id}/external-accounts/{external_account_id} and GET /v1/customers/{customer_id}/external-accounts?idempotency_key=... now include a recipient object in the response when the account belongs to a recipient.

Look up the recipient that owns a specific external bank account.

Use case: Given an external_account_id obtained from a withdrawal or transaction record, this endpoint returns the recipient that owns the bank account, enabling reconciliation flows that need to map a bank account back to a recipient.

Important: The external account must belong to a recipient. Self-owned accounts (registered via the External Accounts API) are not addressable through this endpoint and will return 404.