Letter and Registered Mail:
The Nitrokey GmbH has a heterogeneous customer base, private and enterprise customers, from Germany as well as inside and outside of the EU. With the pricing we want to ensure that all customers pay a uniform rate. For example, a large international corporation should pay just as much as a German private customer. Accordingly, the gross price (incl. VAT) for German private customers equals the net price (excluding VAT) for EU enterprise customers and all customers outside of the EU. This approach has been audited and is legally correct.
At the time of ordering, our system takes the exchange rate from blockchain.info and adds 10% on top of it. The 10% are for our handling fees (exchanging Bitcoins back to Euro) and for the risk implicated by floating exchange rate.
To return a goods (e.g. Nitrokey):