Which of the following is considered a best practice when handling credit card transactions?

Verifying all client contact information is considered a best practice when handling credit card transactions because it helps to ensure the security of the transaction and to confirm the legitimacy of the cardholder. This practice minimizes the risk of fraud and unauthorized use of credit cards, as it requires the travel agent to have accurate and complete information about the client. By confirming the client’s contact details, including their email address and phone number, the agent enables better communication and creates a reliable record for future interactions, which can be critical for resolving any potential disputes.

In contrast, asking for cash payments may limit flexibility and convenience for the client, and not all clients may prefer this method. Using personal information for verification may breach privacy regulations and create security vulnerabilities, as it could expose sensitive data that should be protected. Accepting only local currency could complicate transactions for international clients and may not be practical in many situations, thus limiting the agent's ability to cater to diverse clientele effectively.