Employee vs. Employer Contributions
In most 401(k) plans, both the employee and the employer contribute. While employee contributions are always 100% vested, employer contributions may be subject to a vesting schedule.
For example, the QDRO may need to clarify whether the alternate payee is entitled only to vested funds or to a share of contributions that were unvested at the time of divorce. Failing to identify this can lead to disputes with the plan administrator—and denied benefits.

