Employee vs. Employer Contributions
One of the first decisions is whether the alternate payee (usually the non-employee spouse) will receive a portion of just the employee contributions, or if they’ll also get a share of the employer match contributions. This can make a sizeable difference.
Employer contributions may be subject to a vesting schedule—meaning the employee may not own the entire balance yet. If you don’t account for this, the alternate payee could wind up getting less than expected, or the order might get rejected by the plan administrator.

