1. Employee vs. Employer Contributions
This plan likely includes both employee deferrals and employer profit-sharing contributions. The employee’s own contributions (and investment gains/losses) are usually 100% vested from the start. But employer contributions might be subject to a vesting schedule.
Make sure your QDRO only awards vested portions to the alternate payee. Any unvested employer contributions as of the cutoff date (usually the date of separation or divorce) will be forfeited and not paid out.

