Travelling overseas is a very exciting experience but one that first-time travellers should approach with a reasonable degree of caution. There are all kinds of differences between our laws and culture, and those of most other overseas countries. In some places it is easy to fall victim to theft, particularly of passports, money and credit cards. Western travellers are targets because they are perceived to be wealthy by local standards.
A little bit of organisation with their bank prior to departure is all that is required to protect their credit cards. First, make sure that the contact details the bank has are up to date. Often people have had their accounts for so long that they forget they may have changed some important details.