Terms of Use

1. Parties and scope

These terms govern the relationship between Prefux Teknoloji Yazılım Elektronik Limited Şirketi (“Prefux”, “we”) and the business using the Prefux Business Suite service together with the users for whom accounts are created on that business's behalf (“you”).

Starting to use the service — registering, signing in, or using the app — means you accept these terms. If you do not accept them, do not use the service.

Rules specific to purchasing a subscription (pre-contractual information, right of withdrawal, refunds) are set out separately in the Distance Sales Agreement. Processing of personal data is covered by the Privacy Policy.

2. Definitions

• Service — Prefux Business Suite; the web panel (app.prefux.com), the mobile app (com.prefux.app) and the application interface delivered through api.prefux.com.
• Business — the legal entity or sole trader subscribing to the service in the course of its commercial activity. Each business's data is kept in a separate database.
• User — a person for whom the business creates an account (cashier, waiter, courier, manager, owner).
• Owner — the user who opens the business's first account and represents the business.
• Module — the functional parts of the service that can be switched on and off individually (sales, inventory, restaurant, courier, finance, reporting and similar).
• Business data — all records the business enters into or produces through the service.

3. Accounts, authorisation and security

An account belongs to one person and may not be shared. The business creates separate accounts for its staff and grants each account only the permissions needed to do its job.

• You are responsible for keeping your password confidential and for actions taken through your account.
• If you notice unauthorised use of your account, change your password immediately and tell us.
• We recommend enabling two-factor authentication (TOTP); this matters especially for manager and owner accounts.
• Authorisation is enforced on the server. Attempting an action you are not permitted to perform by modifying the interface is a breach of these terms.

The business must inform the users it creates accounts for, in its own capacity as data controller. For example, staff in the courier role must be told separately by their employer that their location becomes visible to the business during deliveries.

4. Subscription, trial period and fees

• The trial period is 14 days, requires no credit card, and gives full access with the module set you choose. Each business may use the trial once.
• If no payment is made at the end of the trial, access stops. Business data is preserved for the period stated in section 6.
• Paid subscriptions are billed in advance in monthly or annual periods and in Turkish Lira. The applicable price is the one shown in the panel at the moment of purchase. An annual period gives 12 months of service for the price of 10.
• Payments are taken via iyzico. The card number and security code never reach Prefux servers.
• If you choose to save your card, the subscription renews automatically at the end of each period. If you do not, you pay from the panel each period.
• If a payment fails, it is retried three times — on the due date, 2 days later and 4 days later — with an email each time. After the third attempt the subscription is suspended.
• While a paid period is running, adding and removing modules both take effect at the end of the period; no pro-rata amount is charged or refunded for the remainder. The new price applies from the next period. During the trial, changes take effect immediately (nothing has been charged yet).

We announce price changes by email before they take effect. The new price applies from the first renewal period after the notice; if you do not accept it, you may cancel your subscription.

5. Cancellation and end of access

You can cancel your subscription at any time, from the panel, in a single step. You do not need to talk to us.

• Cancellation takes effect at the end of the period. You continue using the service you paid for until the period ends.
• If you change your mind before the period ends, you can undo the cancellation from the panel.
• For subscriptions suspended because payment failed, a 5-day grace period is granted after the period ends.
• When a subscription closes, the stored card key we keep for automatic renewal is deleted. If you come back, you enter your card once more.

For refund terms see the Distance Sales Agreement.

6. Data ownership and export

• Throughout the subscription you can view, report on and export your data from the panel.
• After a subscription ends, business data is retained for 90 days. If you return within that window, your data is exactly where you left it.
• 90 days is a retention ceiling; business data is deleted by the end of that period. You may request earlier deletion at info@prefux.com. Records that must be retained under tax law are kept for the period the law requires (10 years under Art. 82 of the Turkish Commercial Code).
• If you want a copy of your data on the way out, export it from the panel before the subscription ends, or request it from info@prefux.com.

Records move forward by correcting entries, not by deleting them: a sale or stock movement is never altered retroactively, it is corrected with a reversing entry. This exists for accounting integrity and the audit trail.

7. Your obligations

When using the service:

• You comply with applicable law; in particular, for the personal data you process you are the data controller, and it is you who must inform your own customers and staff.
• You are responsible for the accuracy of the information you enter. Prefux does not verify the data you enter.
• You do not reverse-engineer or attempt to decompile the service, do not place excessive load on it with automated tools, and do not attempt to circumvent security measures.
• You do not resell, rent out or bundle the service into your own product — that requires a separate written agreement.
• You do not upload unlawful content or infringe the rights of others.

8. Tax law and fiscal documents

Prefux is business management software. It is not a fiscal cash register (ÖKC), nor an e-Invoice or e-Archive service provider, and it does not issue fiscal documents on your behalf.

• The obligation to issue the legally required fiscal document for your sales (ÖKC receipt, e-Archive invoice, e-Invoice, e-Adisyon, etc.), to use a fiscal cash register and to keep these documents rests entirely with you as the taxpayer. This also covers orders received from delivery platforms (Yemeksepeti, Trendyol Go, Getir, etc.).
• Receipts printed by Prefux carry the statement “BİLGİ FİŞİDİR — MALİ DEĞERİ YOKTUR” (information slip — no fiscal value) and do not replace a fiscal document.
• If you do not use the cash register integration, use a device the integration does not support, or a sale cannot be delivered to the device for any reason, it is your responsibility to issue the fiscal document on your cash register separately. When the integration is on, the delivery result of every sale is shown in the panel; following up on sales that could not be sent is your responsibility.
• You are responsible for keeping your records for the legally required retention periods. Before your subscription ends you can export your data as described in section 6.
• Prefux is not liable for tax penalties, late-payment interest or other sanctions imposed on you because a fiscal document was not issued, or was issued incompletely or incorrectly. Liability for Prefux's intent or gross negligence is reserved as described in section 11.

Prefux does not provide tax advice. We recommend consulting your accountant about which document you need to issue and when.

9. Service delivery, maintenance and downtime

We take reasonable care to deliver the service without interruption. That said, no online service is 100% uninterrupted.

• We schedule planned maintenance at low-traffic hours where possible and announce significant downtime in advance.
• The service is provided “as is”; no implied warranty of fitness for a particular purpose is given.
• We take backups regularly; even so, we recommend keeping your own copy of critical data.
• We may improve, change or remove a module or feature. We announce changes that materially affect use in advance.

Your internet connection, devices, printers and payment terminals are your responsibility.

10. Intellectual property

The service itself — software, interface, design, trade marks, logo and documentation — belongs to Prefux and is protected by intellectual property law. A subscription grants you the right to use the service; it does not grant ownership of it.

These rights do not affect ownership of your business data: the data is yours, the software is ours.

11. Limitation of liability

Prefux's total liability arising from this agreement shall not exceed the subscription fees you paid in the 12 months preceding the event giving rise to liability.

Prefux is not liable for indirect and consequential damages such as loss of profit, loss of business, reputational harm, or indirect losses arising from data loss.

These limitations do not apply to damages arising from Prefux's intent or gross negligence, nor to liabilities that cannot be limited under applicable law.

12. Suspension and termination

We may suspend the service or terminate the agreement in the following cases:

• Non-payment of subscription fees (after the trial and payment retries in section 4 and the grace period in section 5 have expired).
• Material breach of these terms — in particular attempts to circumvent security measures, attacks on the integrity of the system, or unlawful use.
• A legally valid decision of a competent authority.

For breaches other than non-payment we give notice first and allow a reasonable period to remedy, to the extent the nature of the situation allows. In urgent security situations we suspend first and notify afterwards.

You may likewise end your subscription at any time as described in section 5.

13. Changes to these terms

We may update these terms. We announce material changes by email and/or through the panel before they take effect. Continuing to use the service after such notice means you accept the updated terms; if you do not accept them, you may cancel your subscription. The date at the top of this page always reflects the version in force.

14. Governing law and jurisdiction

These terms are governed by Turkish law. The Courts and Execution Offices of Alanya have jurisdiction over disputes between the parties.

For users qualifying as consumers, the remedies and jurisdiction rules provided by consumer protection legislation are reserved.

If any provision of these terms is held invalid, the validity of the remaining provisions is unaffected.