Employer Contributions and Vesting Schedules
One of the most common complications in dividing a 401(k) plan is the vesting of employer contributions. In the Kn Platech 401(k) Profit Sharing Plan & Trust, the employee likely owns 100% of their salary deferrals immediately, but employer-matching contributions may be subject to a vesting schedule (such as a five-year graded or three-year cliff vesting).
Only the vested portion of the employer contribution can be awarded to the alternate payee in a QDRO. If your divorce occurs before full vesting, the QDRO should clarify what happens to any portion that later becomes forfeited.

