1. Dividing Employee and Employer Contributions
401(k) accounts usually hold both employee (pre-tax or Roth) and employer contributions. Employee contributions are generally fully vested, but employer contributions may not be. In plans like the Advanced Photographic Solutions Retirement Savings Plan, employer contributions could be subject to a vesting schedule, meaning that only a portion of these funds may belong to the participant depending on years of service.
The QDRO should clearly indicate whether the alternate payee (usually the ex-spouse) is receiving a share of just the vested balance or also unvested amounts that may vest later. If the vesting status is unclear, it can cause a delay or dispute during the plan review.

