Different rules apply for payments to participants who are 5 % owners, to beneficiaries of participants who die before their required beginning date, and to alternate payees under QDROs. (pbgc.gov)
The person whose interest is being transferred is called the «participant», and the person to whom the interest is transferred to is called the «alternate payee.» (fidelity.com)
Distributions made under a qualified domestic relations order (QDRO) to a former spouse or alternate payee; (franklintempleton.com)