We, as TPA, work with different investment providers. Some track loans, some just invest loan repayments when told to do so.
What happens if someone pays off a loan, but the ER still send in payments every week and the money is invested in the trust?
Could that liberally be though of as a Mistake of Fact, and the money returned to the ER to then be given tot he participant? Or, should the money be forfeited and the ER pays the participant outside the plan?