These terms apply when you create an account or purchase a course on mestrium.com. Please read them before purchasing.
Who sells the courses
Harmonicode S.L., Spanish tax ID B22588917, registered address Calle Tagamanent, 9, 08396 Sant Cebrià de Vallalta, Barcelona, Spain, email hello@mestrium.com. Each course is created by an instructor selected by Mestrium, and Harmonicode S.L. is the seller.
The academy and its instructors
Mestrium is the online academy of Harmonicode S.L. Each course identifies the instructor who creates its content and provides the teaching. Authorship and rights in the lessons and materials belong to their respective holders; publishing them in the academy does not in itself make them the property of Harmonicode S.L.
The instructor answers academic questions about their course through the available channels. Harmonicode S.L. manages the platform, purchases, payments, invoicing and commercial issues. This division of responsibilities does not limit the legal obligations of Harmonicode S.L. as the seller or your rights as a consumer. You can report purchase issues to hello@mestrium.com.
Your account
- You need an account to take a course. Use your real details and do not share your password.
- Your account is personal. Sharing it or reselling access is not permitted.
- You must be at least 16 to create an account. If you are under 18, you need permission from your parent or guardian to purchase a course.
Prices and payment
- Prices are shown for each course in euros, including taxes.
- You can pay by card through Stripe.
- After payment you will receive a confirmation email and an invoice, and the course will appear in your learning area.
- Free courses have no charge and are governed by these same terms.
Access to your courses
You can watch a purchased course for as long as it is available on Mestrium, as often as you like and on any device. If a course is withdrawn, we will notify you in advance and give you at least 30 days to finish it.
Withdrawal and refunds
As a consumer, you normally have 14 days to withdraw from an online purchase. Courses are digital content, so you may request immediate access when purchasing. If you request this and acknowledge that you lose your right of withdrawal once the course starts, that right ends when you access the course.
Even so, if the course is not what you expected, email hello@mestrium.com within 14 days of purchase and before completing 20% of the course, and we will refund your payment.
What you may do with a course
The course is intended for your personal learning. You may apply what you learn and create to your own projects. You may not download, copy, share, resell or publish the lessons or their materials unless the course states otherwise.
Reviews, comments and your work
Your reviews and comments must be honest and respectful. Mestrium may remove content that is unlawful, offensive or unrelated to the course. Work you create during the course belongs to you.
Closing an account
You may close your account at any time by emailing hello@mestrium.com. Mestrium may suspend an account that breaches these terms, for example by sharing or reselling courses, after notifying you of the reason.
Liability
Courses teach methods and share experience; results depend on each student. Nothing in these terms limits your statutory rights as a consumer.
If ownership of the business changes
Harmonicode S.L. may transfer these terms, together with your account, to another company in its group or to a buyer of Mestrium. Your rights will be maintained and we will notify you in advance.
Law and complaints
These terms are governed by Spanish law. If a problem arises, first email hello@mestrium.com so we can resolve it as quickly as possible. As a consumer, you may also refer the matter to the courts or consumer bodies where you live.
Last updated: 29 October 2026.