Several secure payment methods are commonly used in email marketing campaigns:
1. Credit and Debit Cards: This is the most traditional method, but ensure that the payment gateway uses SSL encryption to protect sensitive information. 2. PayPal: A widely trusted digital wallet that offers buyer protection and secure transactions. 3. Apple Pay and Google Pay: Mobile payment solutions that offer advanced security features such as biometric authentication. 4. Cryptocurrencies: Although not mainstream, some businesses are starting to accept cryptocurrencies, which offer a high level of security through blockchain technology.