Terms of service
Version 2026-08-01, in force since 1 August 2026
This is a translation
Only the Dutch text is legally binding. This translation is provided for convenience; where the two differ, the Dutch version applies. Read the Dutch version
1. Who we are
Certificate Checker is a service of Ekstra Software B.V., registered with the Dutch Chamber of Commerce under number 94000948, established at Middenveld 13, 5126 DH Gilze, the Netherlands. In these terms we call ourselves "we" or "Certificate Checker"; by "you" we mean the party that creates or uses an account. By "the service" we mean the website certificate-checker.com, the dashboard, the checks we run, the notifications we send and our API.
2. What these terms apply to
These terms apply to creating and using an account on certificate-checker.com, to every plan, and to the use of our API. By creating an account you accept these terms. We expressly reject any purchasing or other terms of your own.
Our service is open to businesses and consumers alike. Where a clause applies to only one of the two, it says so explicitly.
3. Your account and your right to use the service
You create an account with a name, an email address and a password. You are responsible for keeping your login details and the API tokens you create to yourself, and for everything that happens through your account. If you believe someone else has access, change your password and revoke your tokens; let us know as well at support@certificate-checker.com.
As long as you comply with these terms and pay your invoices, you have a personal, non-exclusive and non-transferable right to use the service. One account is meant for one customer. You may not share, rent out or resell your account to third parties.
4. What the service does
At fixed intervals, Certificate Checker connects to the domain names you enter, reads the TLS certificate the server offers, and warns you when its expiry date approaches. We also check whether your site is reachable and report it when it is not. We send notifications by email, and depending on your plan to Slack or to a webhook of your own as well.
We make every effort to run those checks reliably and on time, but:
- We are a monitoring service, not a certificate manager. Requesting, installing and renewing certificates remains your responsibility, and that stays true if a notification from us fails to arrive or arrives late.
- We cannot guarantee that the service works without interruption or without errors. Network failures, DNS problems, outages at our hosting provider and maintenance may cause a check or a notification to happen late or not at all.
- How often we check and which features are available depend on your plan, as stated on the website at the time you take it out.
5. What we expect from you
You monitor only domains you are entitled to monitor. You do not use the service to probe, burden or attack other people's systems, and not in breach of the law.
Our checks are light, ordinary requests; automation through the API is expressly allowed within the limits that apply to your plan. We may restrict usage that noticeably comes at the expense of other customers, after consulting you where that is reasonably possible.
6. Support and maintenance
Report questions, outages and errors by email at support@certificate-checker.com. We respond within two working days, whichever plan you are on. That period concerns our response; how long a solution takes depends on the report.
We maintain the service and release updates. We announce maintenance with a noticeable effect on availability in advance in the dashboard and, where possible, by email. For urgent maintenance, for instance because of a security vulnerability, we may skip that announcement.
7. Backups
We take a full backup of our database every night and keep it for seven days. Those backups exist so the service as a whole can be restored after a failure. They are not an archive for individual customers: we cannot promise to restore individual data you deleted yourself.
8. Plans, trial period and prices
We offer a free plan and several paid plans. Current prices and limits are on the website.
If you choose a paid plan when you register, a 30-day trial period begins. You do not have to provide payment details up front, and nothing is invoiced during that period. The trial is available once per account. If you do not complete your payment details before it ends, your account automatically moves to the free plan; your domains stay in place, within the limits that apply there.
Prices exclude VAT unless stated otherwise. To business customers with a valid, verified VAT identification number we show prices excluding VAT; in all other cases we show the price including VAT. We may change our prices. We announce an increase at the latest at the start of the calendar month before the month in which it takes effect, by email and in the dashboard. That gives you at least a full month to decide, and you can cancel before the new price applies.
9. Right of withdrawal for consumers
If you are a consumer, you have fourteen days to withdraw from the moment you create your account. Within that period you may cancel the agreement without giving a reason. You do so by telling us at support@certificate-checker.com — an informal message is enough — or by switching to the free plan in the dashboard.
At your request we start providing the service immediately, so that you can use it right away. If you then withdraw within the withdrawal period, you pay pro rata for the period the service ran for you. If you started with the trial period from article 8, nothing was invoiced during that period, so you owe nothing.
10. Invoicing and payment
Paid plans are invoiced per full calendar month. If you switch plans mid-month, the change takes effect immediately and we settle the unused part of your previous plan as credit against your next invoices.
We send invoices by email; in the dashboard you can find them with their payment status and download the pdf. Outstanding invoices can be paid online. The payment term is 14 days from the invoice date.
If you do not pay on time, we first send a reminder. If you are a consumer, that reminder gives you at least fourteen days to still pay; only after that do we charge collection costs, and then according to the statutory scale. If you are a business customer, you owe the statutory commercial interest and the statutory collection costs from the due date. We do not charge administration costs of our own.
11. Suspension for non-payment
If an invoice is still unpaid thirty days after its due date, we may suspend the checks and the notifications, after telling you so by email. Your account and your data continue to exist during that period; only the monitoring stops. If you pay after all, we switch the service back on.
If an invoice is still unpaid ninety days after its due date, we may terminate the agreement. Outstanding invoices remain payable after that.
12. Cancelling and terminating
You can cancel at any time by switching to the free plan in the dashboard or by deleting your account. Cancellation takes effect at the end of the current invoiced month; months already invoiced are not refunded, except for the settlement on a mid-month switch described above, and except for what you are entitled to on withdrawal under article 9.
We may terminate an account if you breach these terms, if you fail to pay after a reminder as described in article 11, or if we discontinue the service entirely. In that last case we announce it at least 90 days in advance and refund amounts paid in advance pro rata.
13. What happens to your data after termination
After termination we keep your domains and their check history for another thirty days. If you ask us to restore your account within that period, or you pay what was outstanding after all, we resume the checks with your data intact. After those thirty days we delete it for good; it disappears from our backups within the period stated in article 7.
If you delete your account yourself, that waiting period does not apply and we delete your domains and check history immediately. Invoices and the related records we keep for as long as the law requires. How we handle personal data is set out in our privacy statement.
14. Intellectual property
All intellectual property rights in the service — the software, the website, the design, the documentation and the name Certificate Checker — belong to us or to our licensors. These terms grant you a right of use as described in article 3; no rights are transferred.
The data you enter and the results of the checks on your domains remain yours. We use them to provide the service to you, and beyond that only in aggregated form that cannot be traced back to you, in order to improve the service.
If you believe the service infringes a right of yours or of a third party, tell us immediately, so that we can respond and, if necessary, adjust or replace the part concerned.
15. Confidentiality
We keep confidential what we learn about you that is confidential in nature, and we expect the same from you regarding what we share with you. This obligation does not apply to information that was already public, nor where the law or a competent authority requires disclosure. In that last case we tell you in advance, unless we are not allowed to.
We treat webhook addresses, API tokens and payment links as confidential: we do not record them in log files and we do not share them.
16. Indemnity
You indemnify us against third-party claims arising from your use of the service, to the extent those claims are attributable to you — for instance where you monitor domains you are not entitled to monitor, or use the service in breach of article 5.
17. Force majeure
We are not held to our obligations where we are prevented from meeting them by circumstances beyond our control. These include in any case failures and outages at our hosting, email or payment providers, failures in networks, DNS or power supply, attacks on our infrastructure, strikes and government measures.
If such a situation lasts longer than sixty days, both you and we may terminate the agreement, without any obligation to pay damages arising from it. Amounts paid in advance for the period not delivered are refunded pro rata.
18. Liability
We are not liable for damage resulting from an expired, invalid or incorrectly installed certificate, from a failure on your side, or from a notification that fails to arrive, arrives late or goes unnoticed.
Otherwise, our liability is limited to the amount you paid us in the three months preceding the event causing the damage, up to a maximum of € 500. We are never liable for indirect damage, including lost revenue, missed savings, reputational harm and consequential damage.
Report damage within thirty days after you discovered it or could reasonably have discovered it, so that we can still investigate the cause. Any right to compensation lapses in any case one year after the event that caused the damage.
These limitations do not apply in the case of intent or deliberate recklessness on our part, nor to the extent the law does not permit them.
19. Changes to these terms
We may change these terms. We announce a new version in advance in the dashboard and by email, stating the date on which that version takes effect. From that date we ask you to accept the new version before you use the dashboard again; if you do not accept, you can cancel your account without the new version applying to the remaining period.
For every version we record when you accepted it, and exactly which text that was. Earlier versions remain available on our website.
20. Transfer
We may transfer our rights and obligations under this agreement to someone else, for instance where the business or the service is acquired. We tell you in advance, so that you can cancel if you do not want to continue with the new party. You may transfer your rights and obligations only with our prior written consent.
21. If a clause turns out to be invalid
If a clause in these terms is void or voidable, the remaining clauses continue to apply. In place of the lapsed clause, a clause then applies that comes as close as possible to its intent and that is valid.
22. Governing law
These terms are governed by Dutch law. We submit disputes to the competent court of the Zeeland-West-Brabant District Court, unless mandatory law designates another court. If you are a consumer, you always keep the right to bring the dispute before the court designated by law.
23. Contact
Questions about these terms? Email us at support@certificate-checker.com.