This is easy and secure !

Online payment is made to the MPDI foundation through the well known PayPal money transfer system ( owned by eBay ). All communications are secure and encrypted, and no credit card information is stored on our site, and is available to us in anyway. The PayPal service is a very convenient tool for a non-profit entity like MDPI, since the setup is inexpensive and secure. You may pay directly with a credit card, if you do not have already a PayPal account.