Terms and Conditions


These general conditions of sale are concluded between, on the one hand, the company ADN Group, registered with the RCS of Paris under the number 792 816 928.

Hereinafter referred to as "the seller".

And, on the other hand, Internet users, major non-commercial individuals, wishing to make a purchase on the NSTAA© site visible at the address: www.nstaa.adngroup.com

Hereinafter referred to as “the user”.

These conditions govern the sale of any product or service presented on the site www.nstaa.adngroup.com by the ADN Group Company.

The parties agree that their relations will be exclusively governed by this contract, to the exclusion of any other condition.

Any order duly validated on the site www.level.adngroup.com implies total and unreserved acceptance of these general conditions of sale and, possibly, of the special or specific conditions for one or more products, services or orders.

If a condition were to be lacking, it would be considered to be governed by the practices in force in the distance selling sector whose companies are headquartered in France. ADN Group undertakes to comply with all the provisions of the Consumer Code relating to distance selling.


These conditions are intended to define the terms of sale between the seller and the user, from the order to the services, including payment and delivery.

They regulate all the steps necessary for placing the order and ensure the follow-up of this order between the contracting parties.

The order can only be registered on the site if the user has clearly identified himself by entering his username and password which are strictly personal to him.

The user declares to be at least 18 years old and to have the legal capacity or to hold parental authorization allowing him to place an order on the Site.

Any order implies acceptance of the prices and description of the products available for sale.

The user declares to have read and accepted these General Conditions of Sale before placing your order. The validation of your order therefore implies acceptance of these General Conditions of Sale.

ADN Group undertakes to honor orders received on the website. In the absence of availability of the product, the seller undertakes to inform the user.

The Site is accessible to all users of the Internet network in principle 24/24h, 7/7d, except interruption, scheduled or not, by ADN Group or its service providers, for the needs of its maintenance and/or security or case of force. major (as defined below). ADN Group cannot be held responsible for any damage, whatever its nature, resulting from the unavailability of the Site.

ADN Group does not guarantee that the Site will be free from anomalies, errors or bugs, or that the Site will operate without failure or interruption. In this regard, he may freely and at his sole discretion determine any period of unavailability of the Site or its content. ADN Group cannot be held responsible for problems with data transmission, connection or unavailability of the network.

ADN Group reserves the right to make changes to the Site, for technical or commercial reasons. When these modifications do not alter the conditions of the provision of services, in a substantial and negative way, the Customer may be informed of the modifications made, but its acceptance is not required.



There is no limit in the use of the coupon to take the test, once the order has been delivered (delivery of the coupon allowing you to take the test online)


The user will only pay for his online purchases via payment by credit card: Carte Bleue, Visa, Mastercard, American Express Card or Apple Pay.

Your banking information is never in our possession. Transactions are entirely processed by the secure payment module of our partner STRIPE.


The prices of our products are indicated in euros, all taxes included.

The prices of the products are indicated on the Site in euros for Europe, including VAT.

All prices displayed are calculated and include the value added tax (VAT) applicable in France or that applicable in the country of delivery located in the European Union.

ADN Group reserves the right to modify its prices at any time, but the Products will be invoiced on the basis of the prices in force at the time of registration and payment of the Order, subject to availability.

The Products are payable in cash when the actual Order is placed.

Payment for purchases is made via the secure platform of our payment provider STRIPE.

Stripe is an American company of Irish origin, intended for internet payment for professionals whose head office is located at 3180 18TH STREET CA 94110 SAN FRANCISCO, USA

For any information, the Customer can consult the following website https://stripe.com/fr

The seller reserves the right to modify its prices at any time, but the products will be invoiced on the basis of the prices in force at the time of the registration of the orders.

The prices indicated on the site are guaranteed for the duration of posting.


In accordance with the European directive of 03/24/2011, the user has a period of fourteen (14) days to exercise his right of withdrawal by informing the seller, by email, of his wish to cancel his order. The period of fourteen days runs from the date of receipt of the password and the identifier.

The user has fourteen days from his notification of withdrawal (by email or by post, indicating the references of his order) to cancel his purchase.

The refund or other means of compensation will be effective after written cancellation of the order.

  Article L211-5 consumer code

To be in conformity with the contract, the good must:

1 - be fit for the use usually expected of a similar good and, where applicable:

correspond to the description given by the seller and possess the qualities that the latter presented to the buyer in the form of a sample or model.

present the qualities that a buyer can legitimately expect given the public statements made by the seller, the producer or his representative, in particular in advertising or labeling.

2 - Or present the characteristics defined by mutual agreement by the parties or be suitable for any special use sought by the buyer, brought to the seller's attention and which the latter has accepted.

Article L211-12 consumer code

The action resulting from the lack of conformity is prescribed by two years from the delivery of the goods.


If in doubt about the unauthorized use of the account, the customer must promptly report it to the seller.

In all cases, the online provision of the credit card number and the final validation of the order will be worth proof of the entirety of the said order in accordance with the provisions of the law of March 13, 2000 and will be worth payment of the sums committed by the seizure items listed on the purchase order.

This validation is worth signature and express acceptance of all the operations carried out on the site. However, in the event of fraudulent use of his bank card, the customer is invited, as soon as this use is observed, to contact the seller's customer service by calling the ADN Group teams on 01 58 56 26 25 or by writing to contact@ adngroup.com



The company ADN Group has, for all the stages of order taking as well as for the stages subsequent to the conclusion of the contract, an obligation of result.

Thus the seller undertakes to describe with the greatest accuracy the products sold on the website www.level.adngroup.com. On the other hand, the seller's liability cannot be engaged in the event that the non-performance of its obligations is attributable either to the unforeseeable and insurmountable event of a third party to the contract or to a case of force majeure as defined by French case law. Similarly, the seller cannot be held liable for any inconvenience or damage inherent in the use of the Internet network, in particular a break in service, an external intrusion or the presence of computer viruses.



The seller reserves the right to collect the data. The personal data communicated by the user or collected via the operation of the site (through cookies or active x) are intended to ensure the successful completion of deliveries, to improve the quality of service and to better meet expectations. client. The user consents to the use of this data by the seller, in particular to communicate information relating to services and promotional offers that may be of interest to him.

If he does not wish to receive these offers, he can request it at any time either directly on the Internet in his account, or by mail to the address 9 rue Guénegaud, 75006 Paris, indicating his surname, first name, email address. -mail.

In accordance with the provisions of the Data Protection Act of January 6, 1978, the customer has the right to access and rectify the personal data concerning him, on simple written request to the seller's customer service.

Customer data is kept confidential by the Seller for a period of 2 years from the last visit to the site. This information is never shared with third parties or resold for any purpose other than the performance of services rendered by ADN Group.

The user is informed that this automated processing of information, in particular the management of e-mail addresses, has been declared to the CNIL under number 1677586 dated 04/06/2013.

The seller implements all means to ensure the confidentiality and security of data transmitted on the web. As such, the website uses a secure method of payment such as SSL (Secure Socket Layer).


All elements of the www.nstaa.adngroup.com site, whether visual or audio, including the underlying technology, are protected by copyright, trademarks or patents.


In the event that one of the clauses of this contract would be null and void by a change in legislation, regulation or by a court decision, this can in no way affect the validity and respect of these general conditions of sale.


These conditions apply for the entire duration of the online services offered by ADN Group.

The computerized registers, kept in the computer systems of ADN Group and its partners under reasonable security conditions, will be considered as proof of communications, orders and payments made between the parties.



The archiving of purchase orders and invoices is carried out on a reliable and durable medium so as to correspond to a faithful and durable copy in accordance with article 1348 of the civil code.


These conditions are subject to French law. The competent court in the event of a dispute will be that of the place of residence of the defendant or, at the choice of the plaintiff, of the place of actual delivery of the product.

In the event of a dispute arising from an Order or a sale, the Customer may submit a written complaint to Customer Service contact@adngroup.com

In the event of a complaint not resolved amicably by Customer Service and for a period of one (1) year, the Customer may make free use of the CM2C mediation service, to which ADN Group is a member, by electronic means at the address cm2c@cm2c .net or by post: CM2C – 14 rue Saint Jean – 75017 Paris, in accordance with Article L. 612-1 of the Consumer Code. The Mediator Service can be contacted for any consumer dispute whose amicable settlement has not been successful.

The Customer may also contact the dispute resolution platform put online by the European Commission at the following address: http://ec.europa.eu/consumers/odr/, in particular in the event of a cross-border dispute.

In addition, the Customer always has the right to take legal action to resolve a dispute. Any dispute must be submitted exclusively to the competent courts within the jurisdiction of the Paris Court of Appeal, or, when the Customer is a consumer, to any court legally competent.