Employee vs. Employer Contributions
Every 401(k) includes amounts the employee contributes from their paycheck, but many also include employer “match” contributions. These employer contributions may be subject to a vesting schedule, meaning they aren’t fully owned by the employee right away.
Be sure your QDRO specifies whether it includes only vested funds or both vested and non-vested balances. If your divorce settlement includes “all contributions acquired during the marriage,” then employer matches (even if not 100% vested yet) will likely be included.

