Privacy Policy

Last updated: [09 December 2025]

Introduction

ONCE center, established in Amsterdam, Netherlands (“we”, “us”, “our”) respects your privacy and is committed to protecting it through compliance with data protection laws and transparent data practices. This policy describes how we collect, use, disclose, store and protect your personal data when you use our website (www.once.be) and when you engage our services (consultations, therapy sessions, screenings, etc.).

This policy applies to data collected:

• via the website and any online forms, contact forms, booking/registration forms, newsletter sign-up;
• via email, messages, phone calls or other direct communications;
• during provision of our services (e.g. medical/therapy screening, consultations, therapeutic sessions);
• via cookies / analytics / tracking when you visit our website.
  
  
  

If you do not agree with the terms of this policy, please do not use our website or submit personal data.

Information We Collect

We collect information you provide voluntarily (when contacting us, registering, booking, or filling out screening forms), which may include:

• Name, date of birth, contact information (email, phone, address), country of residence;
• Medical and mental health history, screening responses, consent forms, notes necessary for safe provision of therapy;
• Emergency contact (if required for booking) and billing/payment data (when relevant).
  
  
  

We also collect automatically:

• Usage data: IP address, browser/device type, pages visited, time & date of visit, referral data;
• Cookies and tracking technologies to enable basic site functionality, remember preferences, and (only with your explicit consent) run marketing/analytics.
  
  
  

How We Use Your Data

We use your data for:

• delivering our services — booking, screening, therapy, follow-ups, integration sessions;
• communicating with you — confirmations, support, reminders, updates;
• ensuring safety and compliance with medical/therapeutic protocols;
• improving and maintaining our website and services;
• legal and regulatory compliance;
• marketing and communications only if you explicitly consent (newsletter, promotional materials);
• anonymized data analysis to improve our approach, only when health data is processed with consent.
  
  
  

We do not sell your data or share it with third parties for marketing without explicit consent.

Legal Basis for Processing (within EU / Netherlands)

Depending on the situation, our processing is based on:

• Consent — for optional processing (newsletter, marketing, sensitive health data, cookies).
• Contractual necessity — to provide services you request (therapy, consultations, booking).
• Legitimate interests — to maintain and secure our website, prevent fraud, ensure service quality, except where overridden by your rights.
  
  
  

Data Sharing & Disclosure

Your personal data may be disclosed only to:

• Medical and therapeutic professionals working at ONCE Center as part of providing care (with your consent and only as needed).
• Service providers such as payment processors, hosting providers, analytics tools — under strict data-processing agreements and only for the purposes of supporting our services.
• Legal authorities only if required by law (e.g. in cases of legal obligation or emergencies).
  
  
  

We do not sell or rent your personal data.

Data Retention

We retain personal data only as long as necessary for the purposes listed:

• For contact / inquiry data — up to 2 years after last contact (unless longer retention is required).
  
  
  
• For health, treatment, therapy and booking records — for the duration of the therapeutic relationship and up to 7 years after completion (or as required by medical record-keeping laws).
  
  
  
• For marketing data — until you withdraw consent or unsubscribe.
  
  
  

Your Rights (if you are in EU/Netherlands)

You have the right to:

• access your personal data;
• request correction or update of inaccurate data;
• request deletion (“right to be forgotten”) unless there is a legitimate reason to retain data;
• restrict or object to processing under certain circumstances;
• request data portability;
• withdraw consent at any time (for consent-based processing);
• lodge a complaint with the relevant data protection authority if you believe your rights were violated.
  
  
  

To exercise these rights, contact us at: care@once.be

Cookies & Tracking

We use cookies and similar technologies. We will obtain your explicit consent before setting non-essential cookies (analytics, marketing). You may manage or block cookies via your browser settings; note that this may alter website functionality.

Children & Minors

Our services are intended for adults (18+). We do not knowingly collect data from minors. If you are under 18, please do not use our services or submit data.

Data Security

We implement appropriate technical and organizational measures to safeguard data: secure servers, encryption, access controls, and confidentiality obligations for all staff and collaborators.

Contact & Data Protection Officer

If you have questions or requests related to personal data, contact:
ONCE Center
Email: care@once.be

Changes to This Privacy Policy

We may update this policy from time to time. When we do, we’ll post the new version with a revised “Last updated” date. Continued use of our website after changes constitutes acceptance of the updated policy.