You have an appointment with a solicitor or a mediator about child maintenance or extraordinary expenses: a variation, arrears piling up, a dispute with the other parent. What you bring that day will carry real weight. A professional handed a shoebox full of receipts will have to bill hours of sorting before they can even analyse your situation. A structured file allows immediate analysis: your fees go towards strategy rather than filing, and your position gains credibility from the first minute. Here is the complete method for preparing that file.
What your solicitor actually needs
Before worrying about details, understand what the professional needs in order to work. Four elements form the foundation of any child expenses file.
The order or agreement. This is the court order, consent order or written parenting agreement that sets child maintenance and, above all, how extraordinary expenses are split: 50/50, in proportion to income, or under some other formula. Without this document, nobody can say who owes what. Include any later variations or written agreements that changed it.
The chronological schedule of claimed expenses. A table, line by line, showing for each expense: the date, what it was for, the total amount, each parent's share under the agreed split, and what has already been paid or reimbursed. This is the backbone of the file: everything else attaches to it.
The numbered exhibits. Every line of the schedule must point to an identified document: an invoice, a receipt, a bank statement, a confirmation letter. Simple numbering (E1, E2, E3 and so on) carried into the table is enough to create that correspondence.
The history of reimbursement requests. The emails sent to the other parent, the summaries you passed on, the reminders that went unanswered. These exchanges show that you claimed the amounts in good time and that the deadlock is not of your making.
Organise everything by period (by year, or by quarter if the volume is large). The solicitor should be able to follow how the situation developed without any reconstruction work.
The method, step by step
Step 1: gather the order or agreement and its variations
Start with the base document. Check that you hold the signed version or the full order, not a draft or an extract. Read carefully what it actually provides: which costs are covered by the monthly maintenance, which count as extraordinary, what split applies, and whether the other parent's prior agreement is required for certain expenses. If the line between ordinary and extraordinary costs feels blurry, our guide Extraordinary expenses: the complete list will help you see clearly before the appointment.
Step 2: rebuild the expenses by category
Group the spending into broad families: medical and paramedical, school, sport and cultural activities, childcare, equipment. Within each category, list the expenses in chronological order. This double classification (category then date) lets the solicitor spot the big cost areas and the periods concerned at a glance.
Step 3: separate ordinary from extraordinary according to your own order
Be careful: the boundary between ordinary and extraordinary expenses is not universal. It depends on what your order or agreement says. The same cost can be included in the monthly maintenance in one case and shared separately in another. Classify each expense according to your own document, not a generic list found online.
Step 4: calculate the balance claimed, precisely
For each line, the calculation must be transparent: total amount of the expense, split applied, share owed by the other parent, amount already reimbursed, balance outstanding. Then add up the balances by period, and overall. A final figure justified line by line is infinitely more convincing than an overall estimate, however honest.
Step 5: attach proof of every payment and every request
Two kinds of proof matter: proof that you paid (bank statement, receipt, paid invoice) and proof that you asked for reimbursement (dated email, message, summary sent). A request that went unanswered can be documented too: keep the message you sent and note the silence. If the other parent never replies, read our article Documenting alone when the other parent will not cooperate: you can build a solid file even with no cooperation at all.
The golden rule: one line = one document. Every expense in your schedule must connect, in a single step, to its numbered exhibit. A line without a document weakens the whole table; a document without a line serves no purpose. This systematic correspondence is what turns a pile of paperwork into a usable file.
The mistakes that weaken a file
Some very common habits sabotage files built on perfectly real spending.
Round amounts "from memory". Writing "about £200 of medical costs in March" with nothing to back it up casts doubt on the whole schedule. A shorter list that is fully evidenced beats a long list scattered with approximations.
Faded or lost receipts. Thermal receipts fade within months. If the receipt has gone, look for the banking trail of the payment or ask the provider for a duplicate. And for the future, photograph every receipt the moment you get it.
Mixing up the years. A table where 2023 sits next to 2025 in no order forces the reader to re-sort everything. Keep a strict chronology, period by period.
Expenses incurred without the required prior agreement. If your order requires you to consult the other parent before certain spending, claiming costs incurred without that agreement weakens your case. Point these items out to your solicitor rather than slipping them into the pile: they will decide how to handle them.
The spreadsheet rebuilt the night before. A reconstruction knocked together in one evening, with uniform dates and recomposed amounts, is quickly spotted. A record kept as you go, regularly, with its small natural variations, is far more credible than a document plainly produced for the occasion.
Digital records as an ally: timestamps and SHA-256 fingerprints
A well built digital file can considerably strengthen the value of your documents. Two mechanisms work in your favour. Timestamping, first: a receipt photographed and saved on the day of the expense carries a date consistent with the cost it proves. The digital fingerprint, second: a SHA-256 code calculated at the moment of saving makes it possible to show that a document has not been altered afterwards, since the slightest edit would change the fingerprint.
In practice, a clean export combining the chronological schedule, timestamped receipts and digital fingerprints presents a consistency that is hard to challenge. That is exactly what Kidivi does: the app generates this complete PDF file, schedule, receipts and fingerprints included, in seconds, from the expenses you record day to day. To understand how these elements are then weighed in court, see our article Proving child expenses in court.
How far back should you go?
This is a question to settle with your solicitor: only they, looking at your situation and your order, can tell you how far back it is relevant and possible to go. Do not censor yourself in advance: prepare what you have and let them do the sorting. One thing is certain: the older and more continuous your documentation, the more it is worth. A record kept without interruption for years tells the story of careful management; scattered fragments leave grey areas. If you are only starting today, that is fine: document everything perfectly from now on and reconstruct the past as best you can, without inventing anything.
The final checklist for the file
Before the appointment, check every item in this table.
| Item | Why | Common mistake |
|---|---|---|
| Court order or agreement + variations | Sets maintenance, the expense split and any required agreements | Bringing only an extract or an unsigned version |
| Chronological schedule of expenses | Gives the solicitor a complete picture in minutes | Mixing up years or categories |
| Numbered exhibits (E1, E2...) | Links every line of the schedule to its proof | Handing over a loose pile of receipts, unconnected to the table |
| Proof of payment | Establishes that you actually paid the amounts out | Relying on faded thermal receipts |
| History of reimbursement requests | Shows you claimed the money in good time | Having asked for everything verbally, with no written trace |
| Line by line balance calculation | Puts a verifiable figure on the claim | Putting forward one overall amount "from memory" |
| Timestamped digital export (PDF) | Adds credibility through timestamps and fingerprints | Rebuilding a spreadsheet the night before the appointment |
One last word of reassurance: nobody expects a perfect file from you. An honest schedule, documents linked to every line and a regular record keeping habit are enough to give your solicitor or mediator a solid working base. Every hour you invest in this preparation is an hour of fees that will go towards defending your interests instead of sorting paperwork.
Document every expense in 10 seconds
Kidivi reads the receipt from a photo, separates ordinary from extraordinary costs, works out each parent's share and prepares a PDF ready for your lawyer or mediator.
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