Last updated: 10 September 2026
This policy applies to every payment we accept through our online payment links, including PromptPay QR, credit and debit cards, card instalments, banking apps and e-wallets.
1. Who we are
- BT San Technology (Thailand) Co., Ltd. ("the Company", "we")
- Address: 9/40 หมู่ 13 ตำบลศิลา อำเภอเมืองขอนแก่น จังหวัดขอนแก่น 40000
- Email: [email protected] · Phone: 083-515-9824
- Please contact us through the channels above before taking any other action on payment, cancellation or refund matters.
2. Currency and accepted methods
- We invoice and accept payment in Thai Baht (THB) only.
- PromptPay QR — no additional fee.
- Credit / debit cards and card instalments (3, 4, 6 or 10 months).
- Banking apps and e-wallets.
- Payment processing is handled by a PCI DSS compliant third-party provider. We do not store customer card numbers in our systems.
3. Payment processing fees
- For methods that carry a processing cost, the fee is shown as a separate line on the payment page before you confirm. You always see the exact total before paying.
- PromptPay QR carries no fee and is the method we recommend.
- Processing fees are charged and deducted by the payment provider at the moment of the transaction and are therefore non-refundable, even where the underlying goods or services are later refunded.
- The receipt we issue states the actual price of the goods or services, excluding the processing fee.
4. Receipts and documents
- On successful payment the system issues an invoice and receipt automatically, and you can open or download the receipt immediately from the payment page.
- If you need a tax invoice or documents issued to a company name, please send us your tax details before paying.
5. Deposits
- For design, software development, installation work and made-to-order items we require a deposit as stated on each quotation.
- Deposits are non-refundable. We use them to reserve your slot in our schedule, purchase project-specific materials and assign the team as soon as payment clears.
- The deposit is deducted from the final instalment of the project.
6. Cancelling work in progress
- You may cancel at any time by written notice to [email protected].
- We will charge for work actually delivered and performed up to the date we receive your notice — including team hours, materials and equipment already purchased, and costs we have already committed to external suppliers.
- If you have paid more than the value of the work performed, we refund the difference under section 9.
- If you have paid less than the value of the work performed, we issue an invoice for the balance.
- We always provide a written summary of the work performed and the amount charged for your review before finalising.
7. Hardware and made-to-order items
- Items manufactured, assembled or purchased specifically to your requirements cannot be returned or exchanged once production or ordering has started.
- For manufacturing defects or transit damage, notify us within 7 days of receipt with photographs. We will repair, replace or refund as appropriate at no cost to you.
- Warranty does not cover damage from misuse, overcurrent, short circuit, impact, water, heat, use of non-specified equipment, or modification by others.
8. Annual services and maintenance agreements
- Prepaid annual service or maintenance fees are not refundable retroactively for periods already served.
- If we terminate the service before the agreed end date, we refund the pro-rata value of the remaining term.
- Renewals are never charged automatically — we notify you and issue a quotation before each renewal date.
9. How to request a refund and how long it takes
- Send your request to [email protected] with the document number (for example QT/2026/00001 or INV/2026/00001), the payment date, the amount and the reason.
- We acknowledge every request within 3 business days and confirm the decision and refund amount within 7 business days.
- Refunds are always issued back to the original payment method used, for the protection of both parties.
- PromptPay / bank transfer / e-wallet: within 7 business days of approval.
- Credit / debit card: we submit the refund within 7 business days, but the time for the credit to appear on your statement depends on your card issuer's billing cycle — typically 15–45 days — which is outside our control.
10. Duplicate or excess payments
- If you pay the same item twice or pay more than the amount invoiced, we refund the excess in full with no deductions.
- Please tell us as soon as you notice an irregular transaction; we will verify and refund within 7 business days.
11. Disputes and card chargebacks
- If you see a transaction that looks wrong, please contact us first at [email protected] or 083-515-9824. We can investigate and resolve it faster than a bank dispute.
- We retain complete transaction records, quotations, invoices, receipts and delivery records for every order to support any investigation.
- Where the error is ours, we refund in full and unconditionally.
12. Payment data security
- We never see or store your card number. When you enter card details on the payment page, your browser sends them directly to our PCI DSS certified payment provider, which returns only a reference token. Our systems receive that token and nothing more.
- The CVV on the back of your card passes through our system solely to forward it to the payment provider for authorisation. We do not write it to our database, do not write it to any log, and do not retain it in memory after the transaction.
- All data in transit is encrypted end-to-end with HTTPS/TLS.
- Payment links are protected by an unguessable 256-bit random token. Nobody who has not received the link from us can reach your transaction.
- Every payment notification from the provider is verified against an HMAC-SHA256 digital signature. Messages that fail verification are rejected immediately, which prevents anyone from faking a successful payment.
- Receipts can only be downloaded once the transaction has genuinely been paid.
13. Data retention and your rights
- We retain the document number, amount, transaction date and time, payment method and payment status as accounting and tax records for the period required by Thai law.
- The only card data we ever see is the last four digits and the issuer brand, returned by the provider so the transaction can be identified.
- Internal access to payment data is limited to staff with accounting and finance responsibilities, and access is logged.
- You have the right to access, correct or request deletion of your personal data under Thailand's Personal Data Protection Act (PDPA), except where accounting and tax law requires us to retain it. Details are in our Privacy Policy.
- If a breach occurs that affects your rights, we will notify you and report it to the regulator as required by law.
- Our platform-wide security measures are described on the Security page.
14. Governing law
- This policy is governed by the laws of the Kingdom of Thailand and subject to the jurisdiction of the Thai courts.
- It applies together with our Terms of Service and Privacy Policy.
The Thai version is authoritative. Where a translation differs in meaning, the Thai text prevails.
