What is the filing receipt in the context of trademark applications?

The filing receipt is indeed a confirmation sent to the correspondence email address after a trademark application has been submitted. This document serves as an acknowledgment of the applicant's submission and includes essential details about the application, such as the application number, filing date, and the mark that has been filed.

It is crucial for applicants to receive this confirmation as it marks the official start of the trademark application process. Furthermore, the filing receipt provides a way for applicants to track the progress of their application and refer back to key information if needed. While other options may seem relevant, only the confirmation sent after submission accurately reflects the nature of the filing receipt in the trademark application process.