Yes, paying on-line is safe providing you use a reputable company that uses secure certificates.
Mindvision uses a 128bit secure system for transfering all personal data from all pages within the 'Client Area' of this site.
Tip: Whenever you make payments on-line, always look for the 'Padlock' which should be displayed somewhere on your browser proving that the company you are paying, is who they say they are and are transfering your details securly.