CSC Messenger Terms of Service

Effective from 10 November 2026

1. General

1.1. These Terms of Service (the Terms) govern the use of the CSC Messenger SMS service (Smart and Premium, including the API; the Service). The Service is provided by OÜ CSC Telecom Estonia, registry code 14422354, VAT no. EE102050660, Väike-Paala tn 1, 11415 Tallinn, Estonia (the Provider).

1.2. A user of the Service is a legal or natural person who has created an account (the Customer). The Service is intended primarily for businesses and organisations.

1.3. The agreement consists of these Terms, the Privacy Policy, the Data Processing Terms, the Acceptable Use Policy, the Payment and Refund Terms and the current price list. A written agreement signed with a Premium customer prevails over these documents.

1.4. By creating an account or using the Service, the Customer confirms having read, understood and accepted the Terms.

2. Account

2.1. To open a Smart account, the Customer must complete the registration form with correct and complete information. The Provider activates the account after reviewing the data (moderation) and may refuse activation without giving reasons.

2.2. Premium accounts are opened under a separate agreement.

2.3. The Customer keeps its username, password and API keys confidential and is responsible for all activity on its account. Any unauthorised use must be reported immediately to info@csc.ee.

2.4. The Customer keeps its account and billing details up to date.

3. Service

3.1. The Service enables sending SMS messages via the web interface and the API to mobile networks in Estonia and abroad.

3.2. The Provider makes reasonable efforts to keep the Service available but does not guarantee delivery where it depends on mobile operators, the recipient’s device or other circumstances beyond the Provider’s control.

3.3. Some countries restrict sender names (sender ID) and content or require registration. The Customer must comply with such rules; the Provider may replace the sender name or refrain from sending a message where the destination country’s rules require so.

3.4. The Provider may perform maintenance. Planned interruptions are announced in advance where possible.

4. Prices and payment

4.1. Prices are listed in the price list on messenger.ee and in the Customer’s account. Prices are in euros and exclude VAT; VAT is added at the statutory rate.

4.2. The price depends on the destination country and network and on the number of message parts (GSM alphabet: up to 160 characters in one SMS, 153 characters per part in longer messages; with Unicode characters such as “õ”: 70/67 characters).

4.3. An individual price agreement with the Customer prevails over the price list.

4.4. Payment and refunds are governed by the Payment and Refund Terms.

5. Customer’s obligations

5.1. The Customer uses the Service only for lawful purposes and in accordance with the Acceptable Use Policy.

5.2. The Customer is responsible for message content, the sender name and for having a legal basis to contact each recipient (including prior consent for direct marketing).

5.3. The Customer compensates the Provider for any damage, fines and costs arising from the Customer’s breach of the Terms or of law.

6. Suspension and termination

6.1. The Provider may suspend the Service or close the account with immediate effect if:

• the Customer breaches the Terms or the law;
• the account sends spam, fraudulent messages or unusually large volumes of traffic (e.g. SMS pumping);
• the account is compromised or used without authorisation;
• the Customer fails to pay on time.

6.2. The Customer may terminate the agreement at any time by written notice to info@csc.ee. The Provider may terminate the agreement with at least 30 days’ notice.

6.3. The Provider may delete an account that has not been used for more than 24 months, after notifying the Customer by e-mail at least 30 days in advance.

7. Liability

7.1. The Provider is liable only for direct material damage caused intentionally or through gross negligence. The Provider is not liable for lost profits or indirect damage.

7.2. The Provider’s total liability is limited to the amount paid by the Customer for the Service during the preceding 3 months.

7.3. Neither party is liable for a breach caused by force majeure (including failures of mobile operators or data networks beyond that party’s control). Force majeure must be notified to the other party without delay.

8. Confidentiality and personal data

8.1. The parties keep confidential any information learned in the course of the Service, unless disclosure is required by law.

8.2. Processing of personal data is described in the Privacy Policy and the Data Processing Terms.

9. Changes

9.1. The Provider may amend the Terms and the price list. Customers are notified of material changes by e-mail or in their account at least 30 days in advance; price changes caused by changes in operator prices may take effect sooner.

9.2. If the Customer does not accept the changes, it may terminate the agreement before they take effect. Continued use of the Service constitutes acceptance.

10. Final provisions

10.1. The agreement is governed by the laws of the Republic of Estonia.

10.2. Disputes are settled by negotiation, failing which in Harju County Court. Consumers may also apply to the Consumer Disputes Committee (www.ttja.ee).

10.3. Contact: OÜ CSC Telecom Estonia, info@csc.ee.