When following up with your caller, the preferred method of communication should be the same as the one used for your initial conversation, unless requested otherwise. However, some forms of communication may be better suited to certain tasks. For example, email or fax should be used when sending a confirmation email or a contract. Text or a link to a website may be used to provide additional information or resources. Phone, email, or chat should be used to address any questions or concerns. To solicit feedback or testimonials, use phone, email, or a survey. If you need to express gratitude or appreciation, use phone, email, or a handwritten note. Remind them of an action or a deadline with phone, email, or text. Lastly, reinforce your brand image and reputation with phone, email, or a newsletter.