Contact the IRA's custodian. Ask for the form needed to name a new beneficiary. Ask if the custodian has additional requirements for naming a trust as a beneficiary, such as an affidavit from the trustee.
Complete the beneficiary form. Insert the irrevocable trust's name on the form as the primary beneficiary. Write the trust's name exactly as it appears on the original agreement. Sign and date the form.
Make a copy of the original irrevocable trust agreement. Attach the copy to the back of the beneficiary form.
Complete any other required forms. Attach the forms to the beneficiary form with the trust agreement. Make at least two copies. Keep one for your records and give one to the trustee.
Send the beneficiary form, agreement copy and any other documents needed, back to the custodian. Ask the custodian for proof of the beneficiary change for your records.