Terms of Service

Last updated: May 18, 2026

1. What you are buying

Course "AI Testing Theory" - a self-paced online course designed to prepare you for the ISTQB Certified Tester AI Testing (CT-AI) exam. The course includes 63 micro-lectures, 300+ practice questions, quizzes, and access to the AI Mentor bot on Telegram.

Seller AI.NASTASIA, operated by Anastasia, Warsaw, Poland.

Contact ai.tester.course@gmail.com

You must be at least 16 years old to purchase or use this course.

2. Pricing and payment

Payments are processed by Lemon Squeezy Inc., which acts as our Merchant of Record. Lemon Squeezy handles payment processing, sales tax/VAT collection, and receipt issuance on our behalf. We do not store your credit card details.

Your purchase receipt and invoice are issued by Lemon Squeezy Inc. as our Merchant of Record. All prices include applicable taxes (VAT/sales tax), which are calculated and collected by Lemon Squeezy based on your location.

If you choose the monthly plan, your access remains active as long as payments are current. Missed payments may result in temporary suspension until the balance is settled.

3. 14-day money-back guarantee

14-day money-back guarantee. If the course is not for you, write to ai.tester.course@gmail.com within 14 days of your purchase and you get a full refund. No interrogation, no hoops. This sits on top of your legal right of withdrawal under EU law, so you are covered either way. Refunds land within 14 days of your request.

For monthly plans, the 14-day guarantee applies to the first payment only.

Your statutory EU right of withdrawal

Separately from our voluntary guarantee, you have a statutory 14-day right of withdrawal under the EU Consumer Rights Directive (Directive 2011/83/EU): you may withdraw from this purchase within 14 days of the contract being concluded, for any reason and with no penalty. To withdraw, email ai.tester.course@gmail.com. On a valid withdrawal we reimburse you in full within 14 days of being notified, using the same payment method you used to pay.

Our voluntary 14-day money-back guarantee and your statutory right of withdrawal are two separate protections that stack: whichever is better for you applies, and our guarantee never reduces your statutory right.

The reimbursement period and refund mechanics above are processed together with Lemon Squeezy Inc. as our Merchant of Record.

4. Course access and duration

Standard course access is valid for 6 months from the date of purchase. This gives you plenty of time to complete the 2-month program at your own pace, review materials, and retake quizzes.

If we introduce a premium or lifetime tier in the future, early buyers may receive upgraded access. Any such upgrade will be communicated by email.

5. Your account

• One account, one person. Your course access is personal and non-transferable.
• Do not redistribute. You may not share, copy, resell, or distribute any course materials (videos, slides, quizzes, PDFs, bot content) in any form.
• Keep your credentials safe. You are responsible for the security of your account. If you suspect unauthorized access, contact us immediately.

6. AI Mentor

The AI Mentor is a supplementary study tool powered by Anthropic Claude (primary) with OpenAI as fallback. Voice input is transcribed by OpenAI Whisper; voice replies are synthesized by ElevenLabs. It is designed to help you understand course concepts, practice questions, and prepare for the exam.

AI Mentor availability depends on third-party services (Telegram, Anthropic, OpenAI, ElevenLabs). We do our best to keep it running, but we cannot guarantee 100% uptime.

7. No exam guarantee

This course is designed to prepare you for the ISTQB CT-AI exam, but we do not guarantee that you will pass. Exam success depends on your effort, preparation, and the specific exam you take. The course covers the official CT-AI syllabus thoroughly, but the exam is administered by ISTQB and its member boards, not by us.

8. Intellectual property

All course content - including but not limited to lectures, scripts, slides, quizzes, illustrations, the AI Mentor's knowledge base, and the Nexus Protocol storyline - is copyrighted by AI.NASTASIA.

ISTQB, CT-AI, and related certification names are trademarks of the International Software Testing Qualifications Board. We reference the ISTQB CT-AI syllabus for educational purposes. This course is not officially endorsed by or affiliated with ISTQB.

9. Limitation of liability

To the extent permitted by applicable law, AI.NASTASIA's total liability for any claim related to this course is limited to the amount you paid for it. We are not liable for indirect, incidental, or consequential damages.

This does not affect any mandatory consumer protection rights you may have under EU or local law.

10. Governing law and disputes

These terms are governed by the laws of Poland. Any disputes will be resolved in the courts of Warsaw, Poland, unless mandatory consumer protection rules in your country require otherwise.

If you are an EU consumer and want to resolve a dispute online, you can use the EU Online Dispute Resolution platform: ec.europa.eu/consumers/odr

We always prefer to resolve things directly first. Email us at ai.tester.course@gmail.com before taking formal steps.

11. Changes to these terms

We may update these terms from time to time. If we make changes that affect your rights, we will notify you by email at least 14 days before they take effect. Your continued use of the course after that period means you accept the updated terms.