Your Privacy Matters
We collect only necessary data to provide services, never sell your information, and give you full control over your data. You have rights to access, correct, or delete your personal information at any time.
Last updated: februar 21, 2026
Introduction
Tridesetri doo, Belgrade respects the privacy of all individuals who visit tridesetri.com and use our services.
Company details: Registration number 21720682, Tax ID 112694162, Narodnih heroja 43, Belgrade 11070, Serbia. This Privacy Policy explains what data we collect, how we use it, and your rights.
We collect the following types of personal data:
- Identification: Name, date of birth, ID number (if applicable)
- Contact: Email address, phone number, postal address
- Professional: Employer, job title, business contact details
- Account: Credentials, subscription details, purchase history
- Technical: IP address, browser, OS, device identifiers
- Usage: Pages visited, time on site, click patterns
- Communications: Messages, feedback, correspondence
- Direct communication: Email, phone, contact forms
- Website forms: Registration, contact, newsletter subscriptions
- Events: Business cards, conferences, networking
- Cookies: Automatically through tracking technologies (see Cookie Policy)
- Social media: Interactions with our profiles
- Third parties: Publicly available sources, partners (with consent)
We process data based on:
- Consent: You explicitly agreed to data processing
- Contract: Necessary to fulfill our service agreement
- Legal obligation: Required by law (tax, accounting)
- Vital interests: To protect you or others
- Legitimate interest: Marketing, security, fraud prevention
- Provide services and fulfill orders
- Send newsletters and communications (with consent)
- Marketing campaigns and personalization
- Customer support and issue resolution
- Website improvement and analytics
- Process job applications
- Legal compliance and safety
We implement technical and organizational measures:
Technical
- Encryption (HTTPS, SSL/TLS)
- Firewalls and access controls
- Regular security audits
- Secure backups
Organizational
- Employee training
- Confidentiality agreements
- Access restrictions
- Data protection policies
Under GDPR and Serbian law, you have the right to:
- Access your data
- Rectify inaccurate data
- Erase your data ("right to be forgotten")
- Restrict processing
- Data portability
- Object to processing
- Withdraw consent
- Lodge a complaint
We retain data only as long as necessary:
- Marketing data: Until consent withdrawn
- Account data: Until account deletion
- Transaction records: 5-10 years (legal requirement)
- Analytics: 26 months (Google Analytics)
- Correspondence: As needed for support
After expiration, data is securely deleted or anonymized.
We may share data with:
- Service providers: Hosting, analytics, email, payments (under contract)
- Legal authorities: When required by law
- Business transfers: Mergers or acquisitions (with notice)
We never sell your data to third parties.
Contact Us
Questions about your data or this policy?
Tridesetri doo, Belgrade
Narodnih heroja 43, Belgrade 11070, Serbia
Reg: 21720682 | Tax ID: 112694162
+381 69 33 33 203
Supervisory Authority
Commissioner for Information of Public Importance
Bulevar kralja Aleksandra 15, Belgrade