For your security, the purchase can be made only by the holder of the credit card. He must come personally to the delivery of "abadás" and stands, in order to show the credit card used for the purchase and to place the signature to confirm the debit.
给这篇翻译加备注
abadás = a getup usually consisting of a t-shirt and shorts or some sort of robe, which allows one to parade following the band wagons during Carnival in Salvador/Bahia camarotes = kind of like boxes along the parade route from which people can watch the activity
"To your own guarantee" is not an expression used in English. What is usually said in cases like this is "for security reasons", or "for your security".