Employee vs. Employer Contributions
Employee contributions (the amount the participant puts in directly) are always 100% vested. Employer contributions (matching amounts) may be subject to a vesting schedule. During divorce, the QDRO only gives the alternate payee rights to vested funds.
If any part of the employer contribution is unvested at the time of separation or divorce, those amounts may be forfeited later. The QDRO should clearly state whether the division is based on the account balance as of the date of divorce or the date the order is implemented. Timing matters.

