The Phenomenon of Coordinated False Reports
In February 2026, a troubling practice is gaining ground in the phone prospecting world: coordinated spam reporting of competitor numbers. Unscrupulous companies organize fake spam report campaigns to get their competitors' numbers blacklisted.
The mechanism is simple but devastating: about ten people simultaneously report a number on TrueCaller, Hiya, or directly to carriers. Within hours, the targeted number can be marked "likely spam" and see its answer rate drop by 30 to 50%.
Anti-spam apps work on a crowdsourcing principle: the more a number is reported, the more suspicious it becomes. This system, designed to protect consumers, can be weaponized for commercial sabotage.
Identifying Abusive Reports: Warning Signs
How do you distinguish legitimate blacklisting from a competitive attack? Several signals should raise concern:
- Sudden, unexplained drop in answer rate (over 20% in less than 48 hours)
- Recently warmed-up numbers affected for no apparent reason
- Simultaneous pattern across multiple lines
- No changes in your calling practices
- Tense competitive context (new market entry, tender, etc.)
If you suspect sabotage, the first step is to react urgently to limit damage, then build your evidence file.
Legal Arsenal: Civil Liability
French law offers several levers to sanction these practices. The main one is unfair competition action, based on Article 1240 of the Civil Code:
"Any act whatsoever of man that causes damage to another obliges the one by whose fault it occurred to repair it."
Case law has long recognized that commercial disparagement constitutes unfair competition. Falsely reporting a competitor as a spammer falls into this category.
To succeed, you must demonstrate:
- Fault: prove the reports are false and coordinated
- Damage: quantify lost revenue (calculate your losses)
- Causation: establish that blacklisting results from abusive reports
The Criminal Option: Malicious Denunciation
In the most serious cases, Article 226-10 of the French Penal Code may apply. Malicious denunciation is punishable by five years imprisonment and €45,000 fine.
This offense requires a denunciation:
- Directed against a specific person (your company)
- Concerning a fact likely to result in sanctions
- That the author knows to be wholly or partially false
- Addressed to a competent authority (carrier, regulatory body...)
The difficulty lies in proving bad faith. Anonymous reports on apps complicate identifying perpetrators.
Building Your Evidence File
Before any action, methodically gather the following elements:
Technical Evidence
- Time-stamped call logs: volumes, durations, daily answer rates
- Reputation history: dated TrueCaller, Hiya screenshots
- Monitoring reports: if using a tool like HUHU, export reputation data
- Temporal correlation: show the link between the drop and unchanged practices
Contextual Evidence
- Competitive context: tender lost by competitor, product launch, etc.
- History: tense exchanges, threats, competitor's past practices
- Witness statements: employees aware of the reporting campaign
Bailiff Report
Have a bailiff certify the status of your numbers across spam databases. This dated report carries evidentiary weight in court. Average cost: €200 to €400 per report.
Available Procedures
Emergency Proceedings
If damage is imminent and severe, emergency proceedings before the Commercial Court can quickly obtain:
- Cessation of abusive reports
- Provisional damages
- Publication of the decision
Timeline: 2 to 4 weeks for a hearing.
Full Proceedings
For complete damage compensation, unfair competition action on the merits is necessary. It takes place before the Commercial Court (between merchants) or Civil Court.
Timeline: 12 to 24 months depending on jurisdiction.
Criminal Complaint
In cases of proven malicious denunciation, a complaint can be filed with the public prosecutor or as a civil party before an investigating judge.
Preventive Strategies
Prevention is better than cure. Several measures reduce your exposure:
- Continuous monitoring: check your numbers' reputation daily
- Diversification: don't concentrate all activity on a few numbers
- Documentation: systematically preserve your logs and metrics
- Preventive registration: register your numbers on Hiya and TrueCaller Business to establish legitimacy
- Best practices: follow rules to avoid any legitimate reports
If in doubt about your practices, check our complete FAQ on phone compliance.
FAQ
How can I prove a competitor organized abusive reports?
Direct proof is difficult as reports are often anonymous. Focus on circumstantial evidence: sudden drop without practice changes, competitive context, simultaneous pattern across multiple numbers. A specialized lawyer can request courts to order platforms to disclose reporting logs.
What is the time limit for action?
Unfair competition claims prescribe after 5 years from knowledge of damage. For malicious denunciation, the limit is 6 years. Act quickly: technical evidence fades fast.
Can significant damages be obtained?
Yes. Courts regularly award compensation proportional to demonstrated economic harm. Some decisions have ordered tens of thousands of euros for commercial disparagement. Judgment publication (at the convicted party's expense) is often ordered.
Should I report to the competition authority?
The competition authority handles consumer and competition law violations. A report can help document the practice, but they cannot compensate you. Civil action remains necessary for damages.
