Record the useful details
Include what the expense was for, the child or activity involved, the date, the amount, and who paid or is expected to contribute.
Attach a receipt or other supporting document when it helps the other parent understand and review the expense.
Keep decisions separate from assumptions
Use a request or message to discuss an expense that needs agreement. Keep the expense record clear about what was submitted, reviewed, paid, or still outstanding.
Zuko helps organize records; it does not decide legal responsibility for a cost or replace financial or legal advice.