Unpaid Work — The Step-by-Step Process from Dunning to Certified Mail to Small Claims Court

This section makes clear the concrete impact unpaid fees have on a freelancer's business operations and why acting early is critical.

Freelancer A, who produced a website, has gone three months past the delivery date without receiving the 1,200,000 yen fee. The client keeps saying "the internal approval process is running behind" and "we'll definitely pay next month," but there is no sign of payment materializing. A has been personally covering subcontracting costs for the next project out of pocket, and living expenses are starting to run dry.

Unpaid fees like this are not simply a matter of "late payment" for a freelancer — they are a serious problem. Sole proprietors, unlike corporations, have a fragile financial foundation, and a single unpaid fee can cascade through the entire business.

A Direct Hit to Cash Flow

Many freelancers allocate 50–70% of monthly revenue to variable costs (subcontracting fees, material costs, equipment investment), meaning delayed incoming payments immediately trigger a cash shortfall. In work such as website production or system development where payments to external collaborators must be made upfront, when a fee goes unpaid the freelancer is left with no choice but to cover it from personal savings.

Spillover into Reputation

When cash flow deteriorates due to unpaid fees, it can cause late deliveries or quality issues on other projects, leading to long-term reputational damage. Since a freelancer's income depends on trust-based repeat work, a single dispute can create opportunity losses well into the future.

Accumulating Psychological Burden

Beyond financial anxiety, the psychological toll of dunning is real. The reluctance to "bring up money" or "risk damaging the relationship" causes many freelancers to hesitate on collection and let the problem drag on.

If this situation is left unaddressed, the final outcome is likely to be writing the fee off. But with the right step-by-step approach, most unpaid fee cases can be resolved. Understanding and implementing a legally grounded dunning procedure is essential for dealing with unpaid freelance fees.

This section analyzes the circumstances on the client's side that cause non-payment and the structural weaknesses on the freelancer's side, to understand the root cause of the problem.

The Client's Cash Flow Problems

The most common pattern for unpaid fees is a deterioration of the client's own cash flow. Small businesses and start-ups in particular tend to experience temporary cash shortfalls due to misalignments between when revenue comes in and when payments are due. In these cases, the payment priority order tends to be "employee salaries > taxes and social insurance > bank repayments > subcontracting fees," meaning payments to freelancers get pushed to the back of the queue.

In B2B transactions, some companies also operate on a model where they pay freelancers after their own final customers pay them — a structure where delays from the end customer are passed directly through to the freelancer.

Ambiguity in the Contractual Relationship

In many freelance projects, work begins on the basis of email and chat exchanges without a formal contract. Because payment terms, acceptance inspection criteria, and the scope of responsibility are left unclear, refusals to pay citing "the deliverable was not what we expected" or "additional revisions are needed" are common.

Furthermore, in transactions that do not meet the requirements for coverage by the Subcontract Act (Act on Prevention of Delayed Payment of Subcontract Proceeds), the legal binding force of payment deadlines is weaker, and clients tend to calculate that the risk of late payment is low.

The Freelancer's Lack of Negotiating Power

Compared to a corporation, a sole proprietor is at a disadvantage on all fronts — legal capability, financial resources, and available time. The calculation that "the cost and time of going to court means it's better to give up" leads clients to read that psychology and keep pushing payment further out.

In practice, for fees under 300,000 yen, legal costs often exceed the recovery amount, which means many freelancers cannot take legal action. This structure of "it's a small amount, so I'll have to accept the loss" enables unscrupulous clients to habitually delay payment.

Industry-Practice Problems

In industries like web production, graphic design, and writing — where the quality of deliverables is inherently subjective — the outrageous response of "I don't like it so I'm not paying" is not uncommon. There are also clients who minimize the importance of paying, saying things like "you got good experience out of it" or "you can use it as a portfolio piece."

Understanding these structural causes enables freelancers to detect the risk of non-payment in advance and put appropriate preventive measures and responses in place. The key insight is that the problem is not a personal emotional dispute but a matter of business interests and legal rights.

This section explains the complete process from initial phone dunning through to small claims court, with timelines, required documents, and costs.

The most effective approach to recovering unpaid fees is to gradually increase the pressure in stages. Rather than jumping straight to legal action, assess the client's situation and payment intent and escalate your response accordingly.

Stage 1: Initial Dunning by Phone or Email (One Week After Due Date)

Start by calling the responsible person directly. At this stage, since the non-payment may simply be a forgotten payment or an administrative delay, approach it without cornering the other party.

"Good day. Regarding the invoice for [project], could you let me know when payment is expected?"

Based on the response, classify the situation into one of three patterns:

• Pattern A: Immediately promises to arrange payment → Wait one week
• Pattern B: Provides a specific payment date → Wait until that date
• Pattern C: Vague response or refusal to pay → Move to Stage 2

Stage 2: Formal Written Dunning (Two Weeks After Due Date)

Send a formal written demand by email or regular mail, stating a specific payment deadline. Keep the tone factual and calm.

Subject: [Important] Re: Invoice No. XX — Payment

At this stage, the key is to make the client aware of your right to charge late payment interest (at a rate of 3–14.6% per annum). There is no need to specify the exact amount at this point.

Stage 3: Certified Mail (One Month After Due Date)

The specific wording is detailed in the next section, but at this stage, send a strongly worded notice that includes a warning of forthcoming legal action. The cost of sending a certified letter is around 700 yen, but the psychological pressure it creates is significant.

Stage 4: Small Claims Court (Two to Three Months After Due Date)

Use the simplified court procedure available for monetary claims of 600,000 yen or less. Details on the process are provided later, but the filing fee is approximately 1–3% of the claim amount (1,000–3,000 yen for a 100,000 yen claim) — making it an affordable option.

Criteria for Advancing to the Next Stage

The criteria for escalating are:

• No response from the other party (one week has passed)
• Payment was not received on the promised date
• A clear expression of refusal to pay
• Unable to reach the other party

Organizing the Required Supporting Documents

Organize the following documents in advance for use throughout all stages:

• Contract or record of email and chat communications
• Invoice and evidence of sending it
• Proof of delivery of the work product (email transmission record, server upload record, etc.)
• Record of dunning (phone notes, email sending record)

With this staged approach, approximately 70% of cases are resolved before small claims court. For the remaining 30%, approximately 90% can be recovered through small claims court. The key is not to get emotional, but to move through the process calmly and methodically.

This section explains the specific wording, format rules, optimal timing, and psychological effects of certified mail at a practical level.

A certified letter (内容証明郵便, naiyoshomei yubin) is a system in which the post office certifies "when, by whom, to whom, and what content was sent in a document." It has no greater legal force than regular mail, but the psychological pressure it places on the recipient is immense — and in many cases payment is realized at this stage.

Basic Format Rules for Certified Letters

A certified letter has strict format rules, and failure to follow them will result in rejection at the post office:

• Paper: Plain white A4 or B4 (writing paper is acceptable)
• Characters: Max 20 characters per line, max 26 lines per page (horizontal writing)
• Character types: Hiragana, katakana, kanji, numerals, and common symbols only
• Corrections: Double underline through deleted portions; affix correction stamp
• Multi-page: If two or more pages, use a split stamp across page breaks

Effective Structure for the Letter

The basic structure of a certified letter is as follows:

                        NOTICE

[Client name]

I submitted an invoice in the amount of ¥XX for website production
services on [date]. However, the agreed payment due date of
[due date] has passed and payment has not been received.

Please arrange payment to the account listed below within [X] days
of receipt of this notice.

Please be advised that if payment is not received within [X] days of
delivery of this notice, we will have no choice but to take legal
action.

Amount: ¥XX
Bank: [Bank name], [Branch name], Regular savings, Account: [Number]
Payment deadline: [Date]

[Date]
                        [Address]
                        [Name]  [Seal]

Practical Points for Writing the Letter

Avoid emotional language and anything that attacks the other party — include only facts and demands. Rather than subjective expressions like "I am in difficulty" or "this is causing me great inconvenience," state the claim calmly as "a legitimate right under the contract."

Set the payment deadline 7–14 days after delivery. Too short and the recipient may push back; too long and the effect is diluted. The phrase "legal action" without being overly specific leaves room for the recipient's imagination to work, which heightens the pressure.

Timing and Frequency

A certified letter achieves maximum effect with a single sending. Sending it multiple times creates a "boy who cried wolf" effect and halves its impact. Therefore, always make final confirmation by phone or email before sending, confirming that the other party has no intention of paying, before you dispatch it.

The optimal timing is around the end or beginning of the month. Most companies process payments monthly, so a letter arriving at this time is more likely to be incorporated into the payment schedule.

The Psychological Effect of Certified Mail

The envelope for certified mail is distinctive, and recipients inevitably associate it with "legal trouble." For corporate recipients in particular, it tends to get forwarded to the accounting or legal department, triggering an organizational response that goes beyond the judgment of the individual contact.

The reason payment materializes at this stage is not a matter of the amount — it is the psychology of wanting to "avoid the hassle of legal proceedings." In practice, the effect of certified mail is unchanged even for small amounts of around 100,000 yen.

Using It with Delivery Confirmation

Always add delivery confirmation to a certified letter (additional cost: 320 yen). This records the date and time the other party received it, which becomes important evidence in later legal proceedings. Even if the letter cannot be delivered due to refusal to accept or failure to retrieve a missed-delivery slip, that fact is documented — providing evidence of the other party's bad faith.

After sending the certified letter, wait until the specified deadline, and if payment is not received, move promptly to the next stage (small claims court, etc.). Any softness in the approach of "let me wait a little longer" gives the other party an opening to exploit.

This section explains the specific procedures, costs, timelines, and win rates of small claims court in detail.

Small claims court is a special procedure at summary courts limited to claims for monetary payment of 600,000 yen or less. Compared to regular civil litigation, the procedure is simplified, making it a system that is accessible even for freelancers acting without legal representation.

The Specific Steps for Filing a Small Claims Case

1. Preparing and Filing the Statement of Claim

File the statement of claim at the appropriate summary court. The court of jurisdiction is in principle the other party's address, but it may also be possible to file at the place where the contract was to be performed (the place where the deliverable was handed over).

Use the standard form distributed by the court. The required details are as follows:

• Names, addresses, and contact information for both parties
• The claim (e.g., "the defendant shall pay the plaintiff ¥XX plus late payment interest")
• The basis for the claim (the factual history from the contract formation through performance and the payment delay)
• The evidence documents to be submitted

2. Fees and Costs

• Filing fee: 500 yen to 6,000 yen depending on the claim amount (1,000 yen for a 100,000 yen claim; 6,000 yen for a 600,000 yen claim)
• Pre-paid postage: approximately 3,000–4,000 yen (varies by court)
• Service cost: approximately 1,600 yen

Total initial costs are typically in the range of 5,000–12,000 yen.

3. Timeline and Flow

Small claims court aims to conclude proceedings in a single hearing. From filing to the first hearing is approximately one to two months, and a judgment is typically issued within three to four months.

The hearing proceeds as follows:

• Confirmation of both parties' claims (15–30 minutes)
• Evidence examination (review of contract, email records, etc.)
• Settlement discussion (mediated by the judge)
• Judgment (if settlement is not reached)

Win Rates and Practical Notes

The win rate in small claims court is approximately 85%. However, this figure needs to be read carefully — only cases that are clearly winnable on the law tend to be filed, which inflates the win rate.

Conditions for winning:

• Contract formation is clear (email or other written agreement)
• Completion and delivery of the work can be proven
• The amount claimed is reasonable (within the scope of the contract or prior agreement)
• The other party's payment delay is clear

Cases where winning is difficult:

• Only a verbal agreement with insufficient supporting evidence
• A dispute over the quality of the deliverable
• A discrepancy in understanding about the contract terms or fee amount
• A legitimate reason for the other party to refuse payment (a material breach of contract, etc.)

Enforcement After Judgment

Even after winning a judgment, if the other party does not voluntarily pay, compulsory enforcement proceedings are required. Enforcement costs additional fees, and if the other party's assets (bank accounts, accounts receivable, etc.) cannot be identified, recovery may be impossible.

For this reason, it is important to investigate the other party's financial position before filing. For a corporation, confirm capital, directors, and other details from the corporate registry; for an individual, gather what information you can about their assets within reasonable means.

Limitations and Drawbacks

Small claims court has the following restrictions:

• Up to 10 cases per year at the same summary court
• The other party can demand transfer to standard civil proceedings
• No right of appeal (only an objection procedure is available)
• No counterclaims permitted

Also, winning a judgment does not guarantee recovery through compulsory enforcement. If the other party has no assets, the judgment may prove worthless.

Criteria for Deciding Whether to File

Criteria for deciding whether to file a small claims case:

• The claim is 50,000 yen or more (taking cost-benefit into account)
• The other party has the ability to pay
• Clear evidence of the contract and delivery
• The certified letter did not resolve the matter

For cases meeting these criteria, small claims court is a highly effective resolution tool. The key is not to file out of emotion, but to calculate the cost-benefit ratio coolly and make a rational decision.

This section organizes concrete preventive measures readers can implement immediately and preparations for responding if a dispute does arise.

Prevention at the Contract Stage

The most effective measure to prevent non-payment is setting appropriate terms at the time of contracting. Always include the following clauses:

• Clear payment terms (not "within 30 days of delivery" but "within 30 days of receipt of the acceptance inspection notice")
• Installment payment terms (for total amounts over 300,000 yen: e.g., 30% upfront, 30% mid-project, 40% on completion)
• A late payment interest clause (14.6% per annum or a reasonable rate)
• A cap on the acceptance inspection period ("inspection to be completed within 7 days of delivery; if no response is received, the deliverable is deemed accepted")

Even for email-based contracts, prepare a "service contract confirmation letter" as a PDF containing these terms, send it to the client, and save their reply accepting the terms as evidence.

Practical Client Screening Before Signing

Before contracting with a new client, conduct at minimum the following due diligence:

• Corporate client: Verify the corporate registry (capital, directors, incorporation date)
• Individual client: Request proof of identity
• Start with a small-value project for the first transaction
• Build up a payment track record before taking on large projects

Warning signs of a problematic client:

• Reluctant to create a written contract
• Refuses upfront or installment payments
• Only reachable via mobile phone and free email
• Uses urgency as a reason to avoid detailed confirmation

Monitoring Projects in Progress

During project execution, continuously monitor the following:

• Speed of response to interim reports (ideally a reply within 48 hours)
• Frequency and nature of additional requests (degree of deviation from the original agreement)
• The internal authority of the client contact (whether they have decision-making power)
• Industry trends and competitor movements

If any of these change, consider hedging early (staged delivery, requesting upfront payment, etc.).

Thorough Evidence Preservation

Build a habit of preserving all communications as evidence:

• Set automatic backup for all email and chat communications
• Follow up phone agreements with email confirmation
• Use dual management — email attachment plus cloud storage — for all deliverables
• For important projects, send invoices by certified mail

Emergency Action Checklist

Checklist for initial response when non-payment occurs:

□ Call within one week of the payment due date
□ Record notes of the other party's response
□ Send a dunning email (with a reply requested)
□ Prepare certified mail (draft the wording, organize required documents)
□ Assess small claims court (claim amount, evidence, other party's financial position)

Sharing and Using Industry Information

Exchange information with peers to learn in advance about problematic clients. Anonymous information sharing takes place in freelancer communities and SNS groups. However, use only factually grounded information — unfounded defamatory statements constitute defamation.

Building a Long-Term Business Structure

Build a business structure that distributes unpaid fee risk:

• Ongoing transactions with multiple clients (avoid dependence on a single client)
• Three to six months of operating capital in reserve
• Consider accounts receivable insurance (annual premium is approximately 1–3% of revenue)
• Secure legal support (a retainer lawyer or the Japan Legal Support Center)

Actions to Take Starting Tomorrow

Concrete actions for readers to take starting the day after reading this article:

1. Review payment terms and supporting documents for all currently active projects
2. For any cases of non-payment, calculate how many days have passed since the payment due date and determine the appropriate dunning stage
3. Prepare a certified letter template that is ready to use at any time
4. Identify the jurisdiction of the relevant summary court and look into the small claims court procedure
5. Join a peer community and build an information-sharing network

Unpaid fee problems for freelancers are not a matter of individual capability or luck — the risk can be substantially reduced with the right knowledge and preparation. The foundation of a sustainable freelance business is built on learning the skills to assert legitimate rights and recover what is owed, rather than accepting the loss.

References

Overview of the Act on Proper Transactions with Specified Consignment Business Operators (2024)

Guidelines for Creating an Environment Where Freelancers Can Work with Peace of Mind (2021)

Survey Results on Freelancer Working Conditions (2020)

Overview of the Subcontract Act (2024)