For our customers in Germany: 
- prepayment

For our customers in the EU: 
- EU-Standard Bank Transfer 

For our customers in Switzerland: 
- Credit Card payment through paypal

For our customers in other parts of the world: 
- Credit Card payment through paypal

EU-Standard Bank Transfer (Prepayment EU)
The cheapest and simplest payment method within the EU is the transfer by means of IBAN and BIC. 

After the purchase request you receive an order confirmation per e-mail, therein you provide all statements necessary for the payment.

Therefore, you leave behind no personal data.