Final answer:
When following up a call or email, always leave your contact information for further communication.
Step-by-step explanation:
When following up a call or email with new information, it is important to always leave your contact information so that the recipient can easily follow up with you as needed. This demonstrates that you still care about the organization or the person you are contacting. Additionally, make sure you have a clear subject line that is specific enough for the recipient to refer back to at a later date.
For example, if you are sending an email to a potential employer, you might include your contact information at the end of the email along with a brief summary of the new information you are providing. This makes it easy for the recipient to reach out to you if they have any further questions or need clarification.