Payments & Billing
HENDENK Unmanned Systems provides professional engineering and consulting services for unmanned systems programs. This page explains how those services are billed and how payment works. It applies together with the Terms of Use and the Refunds, Cancellations & Disputes policy.
What you are paying for
HENDENK sells professional services: advisory work, engineering work packages, embedded technical teams, and program partnerships as described on the Services page. There is no online shop and no physical product checkout on this website. Every engagement is defined in a written agreement or order that states the scope of work, the deliverables, the schedule, the fees, and the currency before any payment is due.
How billing works
- Written agreement first. Fees, currency, payment schedule, and any deposit are agreed in writing before work begins. No payment is ever requested for undefined work.
- Invoices. Payments are made against invoices issued by HENDENK. Each invoice identifies the engagement it belongs to, the amount, the currency, the due date, and the available payment methods.
- Payment schedule. Depending on the engagement, invoicing may be up-front for short advisory work, milestone-based for defined work packages, or periodic (for example monthly) for embedded teams and long-running programs. The applicable schedule is stated in your agreement.
- No hidden charges. Only the amounts stated in your agreement and invoices are charged. HENDENK does not enroll clients in automatic subscriptions through this website.
Accepted payment methods
- Bank transfer. Standard for most business engagements. Transfer details are provided on the invoice itself, never on this public website.
- Card payment. Where card payment is offered for an invoice, it is processed through a secure link or checkout operated by a PCI‑DSS‑compliant third-party payment provider such as Stripe. You pay on the provider’s secure payment page.
The invoice or payment request you receive will state which methods are available for that payment and in which currency the amount is due.
Card data security
This website has no checkout and never asks for card numbers. When you pay by card, your card details are entered directly on the payment provider’s secure page and are handled by that provider under its own security certification and privacy policy. HENDENK does not receive, store, or process your full card number, and card data is never held on this website or its server. What HENDENK receives from the provider is confirmation of the payment and the billing information needed for accounting.
Currency and taxes
The currency of each engagement is fixed in the written agreement and repeated on every invoice, so the amount you authorize at payment is the amount that was agreed. Where value-added tax, sales tax, or withholding tax applies to a cross-border services engagement, its treatment is stated in the agreement and shown on the invoice rather than added as a surprise at payment time.
Receipts and records
Every completed payment is confirmed with a receipt or a marked-paid invoice for your records. If you need a payment document reissued, or your accounts-payable process requires specific referencing, email contact@hendenk.com and it will be arranged.
If something looks wrong
If you receive a payment request that you did not expect, that does not match your agreement, or that you suspect is not genuinely from HENDENK, do not pay it. Verify first by writing to contact@hendenk.com. Billing questions and disputes are handled as described in the Refunds, Cancellations & Disputes policy.