You should never photocopy your credit card details and send them to someone. Your credit card has other details like your bank sort code and your account number. these can be used for duplicating your credit card.for use on-line.
All that they would need would be your long 16 digit number on your card, and your full name as written on the card .
Go through a secure website like paypal , or just send a cheque(takes longer but is safer)
good luck
Tony