Employee vs. Employer Contributions
This plan likely includes both employee contributions (from the participant’s paycheck) and employer profit-sharing or matching contributions. These amounts might not be fully vested yet. That means only a portion may be available for division depending on the participant’s length of service.
Be sure your QDRO clearly states whether you’re dividing the vested balance only or including non-vested employer contributions as of the date of divorce. If the employer contributions aren’t yet vested, they may not be transferable, and your share could be less than expected unless the plan allows allocation of future vesting events.

