Selecting an annuity provider for ERISA retirement plans is a fiduciary duty requiring prudence to avoid liability and protect retirees. Defined contribution plans benefit from a safe harbor under Section 404(e) of ERISA, requiring a structured selection process and insurer financial confirmations. Defined benefit plans must choose the "safest available annuity," often with expert advice. A thorough, documented process and regular reviews are essential to defend fiduciary decisions.