At bk4, protecting the personal data of our players is a responsibility we take seriously. This Privacy Policy explains exactly what information we collect, why we collect it, how it is stored and processed, and the rights you hold over your own data as a registered player on the bk4 platform.
All personal data stored by bk4 is protected using industry-standard AES-256 encryption at rest and TLS 1.2+ encryption in transit. Your account details and payment information are never stored in plain text on our servers.
bk4 does not sell, rent, or trade your personal data to any third party for marketing purposes. Data is shared only with service providers who operate under strict data processing agreements on bk4's behalf.
We collect only the personal data necessary to operate your account, verify your identity, process transactions, and comply with our legal obligations. Every data collection point on the bk4 platform is documented and purposeful.
As a bk4 player, you hold rights over your personal data including the right to access a copy, correct inaccuracies, request deletion where permitted, and withdraw consent for optional processing activities at any time.
bk4 uses cookies and similar tracking technologies strictly for platform functionality, session management, fraud prevention, and performance analytics. We do not use third-party advertising cookies or cross-site tracking scripts.
Our data handling practices are designed to align with internationally recognised privacy principles. bk4 maintains internal data processing records and conducts periodic reviews to ensure ongoing compliance with our stated policy.
Summary: bk4 collects personal data to operate your account, verify your identity, process payments, and keep the platform safe. We do not sell your data. You can request access to, correction of , or deletion of your personal data at any time by contacting our support team. This policy applies to all bk4 players located in Bangladesh.
bk4 is an online casino and sports betting platform operating at https://bk4.bio and targeting players based in Bangladesh. When this Privacy Policy refers to "bk4", "we", "us", or "our", it refers to the operator of the bk4 platform and all services accessible through it.
bk4 acts as the data controller in respect of the personal data collected from registered players and website visitors. As data controller, bk4 determines the purposes and means of processing personal data submitted through the platform. If you have any questions about how your personal data is handled, please contact our support team at the details provided in Section 15 of this policy.
This Privacy Policy applies to all personal data collected in connection with your use of the bk4 website, mobile browser experience, account dashboard, payment systems, customer support communications, and any promotional activities associated with the bk4 brand.
bk4 collects personal data that is necessary, relevant, and proportionate to the purposes for which it is collected. The categories of personal data we may collect about you include the following:
Full legal name, date of birth, gender, and copies of government-issued identification documents such as your National ID card (NID), passport, or driving licence. This data is collected as part of the account registration process and the Know Your Customer (KYC) verification procedure.
Email address, mobile phone number, and residential address (including city, district, and postal code). For Bangladesh players, the mobile number associated with your bKash, Nagad, Rocket, or Upay wallet account is also collected where applicable as part of payment processing and account verification.
Transaction records including deposit amounts, withdrawal amounts, dates and times of transactions, payment method identifiers (such as the registered bKash or Nagad number, masked bank account number, or card last-four digits where applicable), and currency (Bangladeshi Taka, ৳ / BDT). bk4 does not store full card numbers or CVV codes on its own servers.
Login history, session duration, game play history (games played, stakes placed, outcomes, bonus usage), sports bets placed and settled, in-platform communication records, customer support interaction logs, and responsible gaming tool usage (such as deposit limits or cooling-off periods activated).
IP address, device type, operating system, browser type and version, screen resolution, time zone, referring URL, and approximate geographic location derived from IP data. This technical data is collected automatically when you access the bk4 platform.
The content of any communications you send to bk4 via live chat, email, or any other support channel, including complaint records and dispute correspondence. These records are retained to ensure accurate resolution of disputes and to train and quality-assure our support team.
Bangladesh-Specific Note: For players making deposits and withdrawals via bKash, Nagad, Rocket, or Upay, we collect and verify the registered mobile number and wallet-holder name associated with each transaction. This information is required to match payment ownership with your bk4 account as part of our fraud prevention and KYC obligations.
bk4 collects your personal data through the following primary channels:
bk4 uses the personal data it collects for the following purposes:
| Purpose | Data Categories Used |
|---|---|
| Account creation and management | Identity Data, Contact Data |
| KYC identity verification | Identity Data, Financial Data, Contact Data |
| Processing deposits and withdrawals | Financial Data, Identity Data |
| Fraud detection and prevention | Technical Data, Financial Data, Account Activity Data |
| Responsible gaming compliance | Account Activity Data, Financial Data |
| Customer support and dispute resolution | Communications Data, Account Activity Data, Identity Data |
| Platform security and integrity | Technical Data, Account Activity Data |
| Sending account-related notifications | Contact Data |
| Sending promotional communications (with consent) | Contact Data, Account Activity Data |
| Legal and regulatory compliance | All categories as required |
| Platform analytics and improvement | Technical Data, Account Activity Data (anonymised) |
bk4 does not use automated decision-making processes — including profiling — that produce legal or similarly significant effects on players without providing a mechanism for human review and challenge.
bk4 processes personal data on the following legal bases, depending on the purpose of the processing activity:
bk4 does not sell, rent, or trade personal data to third parties. We share personal data only in the circumstances described below, and only to the extent necessary for the stated purpose:
bk4 engages a limited number of carefully selected third-party service providers who process data on our behalf under data processing agreements that require them to maintain appropriate security standards and process data only for the purposes bk4 specifies. These providers include: KYC and identity verification partners, payment processing partners (including mobile wallet operators bKash, Nagad, Rocket, and Upay), cloud hosting and infrastructure providers, customer support platform providers, and game content delivery partners.
Game studios whose titles are available on the bk4 platform — including Pragmatic Play, Evolution Gaming, Ezugi, PG Soft, Habanero, NetEnt, Microgaming, and Spribe — may receive session identifiers and game-related data necessary to serve game content and calculate real-money outcomes. These providers do not receive your full identity data unless required for their own regulatory compliance obligations.
bk4 may be required to disclose personal data to law enforcement agencies, financial intelligence units, or other regulatory authorities where compelled to do so by applicable law, court order, or a lawful request from a competent authority. bk4 will take reasonable steps to notify affected players of such disclosures where legally permitted to do so.
In the event that bk4 undergoes a merger, acquisition, restructuring, or sale of all or part of its business, personal data held by bk4 may be transferred to the acquiring entity as part of the transaction. Players will be notified of any such transfer and its implications for data handling prior to the transfer taking effect.
We Do Not Sell Data: bk4 has never sold personal data to third-party marketers, data brokers, or advertising networks, and has no intention of doing so. Your data is used solely to operate and improve the bk4 platform and to fulfil our legal obligations.
Cookies are small text files stored on your device by your web browser when you visit a website. bk4 uses cookies and similar tracking technologies (such as local storage and session tokens) to operate the platform, maintain your logged-in session, remember your preferences, and gather anonymised analytics about how the platform is used.
You may manage or disable non-essential cookies through your browser settings at any time. Please note that disabling strictly necessary cookies will prevent you from logging in or using core features of the bk4 platform. Instructions for managing cookies in popular browsers are available in each browser's help documentation.
No Advertising Cookies: bk4 does not use advertising cookies, cross-site tracking pixels, or third-party retargeting scripts. We do not participate in programmatic advertising networks or data management platforms that track your browsing behaviour across other websites.
bk4 retains personal data only for as long as is necessary to fulfil the purpose for which it was collected, or as required by applicable legal or regulatory obligations. The following general retention periods apply:
Following the applicable retention period, personal data is securely deleted or irreversibly anonymised so that it can no longer be associated with an individual. Anonymised, aggregated data derived from player activity may be retained indefinitely for statistical and platform improvement purposes.
bk4 maintains a comprehensive set of technical and organisational security measures to protect personal data against unauthorised access, accidental loss, alteration, disclosure, or destruction. Key security measures in place include:
While bk4 takes every reasonable precaution to protect your data, no online platform can guarantee absolute security. Players are encouraged to use strong, unique passwords for their bk4 account and to enable two-factor authentication (2FA) via their account settings to reduce the risk of unauthorised access.
As a registered bk4 player, you hold the following rights in relation to your personal data. To exercise any of these rights, please contact us using the details in Section 15. bk4 will respond to verified requests within 30 days of receipt.
You have the right to request a copy of the personal data bk4 holds about you, along with information about how it is being processed. This is known as a Subject Access Request (SAR). We will provide the requested data in a structured, commonly used, and machine-readable format where technically feasible.
If any personal data bk4 holds about you is inaccurate or incomplete, you have the right to request that we correct or update it without undue delay. You may also update certain account details (such as your contact email or phone number) directly via your account dashboard.
You have the right to request the deletion of your personal data where it is no longer necessary for the purposes for which it was collected, where you have withdrawn consent and no other legal basis applies, or where the data has been processed unlawfully. Please note that bk4 may be required to retain certain data for the minimum retention periods specified in Section 8 to comply with its legal obligations, even following a valid erasure request.
You may request that bk4 temporarily restrict the processing of your personal data while a dispute over its accuracy is being resolved, or while an objection to processing on legitimate interest grounds is being assessed.
You have the right to object to processing of your personal data carried out on the basis of bk4's legitimate interests. You also have an absolute right to object to the use of your personal data for direct marketing purposes at any time, with no need to provide justification.
Where processing is based on your consent (such as optional marketing communications), you may withdraw that consent at any time. Withdrawal of consent does not affect the lawfulness of processing carried out before the withdrawal.
How to Exercise Your Rights: Submit your data rights request via email to [email protected] with the subject line "Data Rights Request — [Your Request Type]". Include your registered account email address and a brief description of your request. We will verify your identity before processing the request and respond within 30 calendar days.
The bk4 platform is strictly intended for adults aged 18 years and older. bk4 does not knowingly collect, store, or process personal data from individuals under the age of 18. If we become aware that a registered account belongs to, or has been created by, a person under 18, we will immediately suspend the account, delete the associated personal data (subject to any mandatory retention obligations), and return any real-money balance to the payment method used for deposits following an identity review.
Parents and guardians who are concerned that a minor in their care may have registered on the bk4 platform are encouraged to contact our support team immediately at [email protected]. We take underage gambling prevention extremely seriously and will act promptly on all such reports.
bk4 recommends that parents and guardians make use of internet filtering and parental control software on devices that may be accessed by minors, to prevent inadvertent access to gambling platforms.
bk4 primarily stores and processes player data on servers located within or proximate to the Asia-Pacific region to minimise latency for Bangladesh-based players and to maintain data residency in an appropriate geographic zone. However, some of our third-party service providers — including cloud infrastructure partners and game content providers — may process data in other countries or regions as part of their global operations.
Where personal data is transferred to or processed in a country outside Bangladesh, bk4 ensures that appropriate safeguards are in place to protect your data to a standard consistent with this Privacy Policy. These safeguards include contractual data processing agreements with sub-processors and, where applicable, standard contractual clauses or equivalent data transfer mechanisms.
By registering an account with bk4 and accepting these terms, you acknowledge and consent to the transfer and processing of your personal data as described in this section.
The bk4 platform may contain informational references to third-party services such as payment providers (bKash, Nagad, Rocket, Upay) or game studios (Pragmatic Play, Evolution Gaming). While bk4 takes care in selecting its partners, we do not control the privacy practices of third-party websites or services, and this Privacy Policy does not apply to any third-party platform you may navigate to from a reference on bk4.
Players are encouraged to review the privacy policies of any third-party service they use in connection with their bk4 account, including their mobile wallet provider's data handling practices, as these are independent of bk4's data processing activities.
bk4 may update this Privacy Policy from time to time to reflect changes in our data practices, operational procedures, or applicable legal requirements. When material changes are made to this policy, bk4 will notify registered players via their registered email address and/or by displaying a prominent notice on the platform no fewer than 7 days before the revised policy takes effect.
The effective date at the top of this page and the "Last updated" badge below the hero section will always reflect the date of the most recent revision. The most current version of this Privacy Policy is permanently available at https://bk4.bio/privacy-policy.
Your continued use of the bk4 platform following the effective date of any revised Privacy Policy constitutes your acceptance of the updated terms. If you do not agree with the revised policy, you should cease using the platform and submit an account closure request to our support team.
If you have any questions, concerns, or requests relating to this Privacy Policy or the manner in which bk4 handles your personal data, please contact our dedicated support team through the following channels:
For formal data rights requests (Subject Access Requests, erasure requests, rectification requests, or objections to processing), please use the email channel and include your registered account email address and the nature of your request in your message. We will acknowledge receipt within 3 business days and provide a substantive response within 30 calendar days.
Support Hours: Our team operates on Bangladesh Standard Time (BST, UTC+6), 24 hours a day, 365 days a year. For urgent matters relating to suspected unauthorised access to your account, please use the live chat option for the fastest possible response and immediate account security action.
Have questions about how bk4 handles your data? Our support team is available around the clock. You can also explore our full Terms & Conditions or visit our Responsible Gaming page for more platform guidance.