It covers all the services related to the study, including reaching the conclusion that there are no outstanding actions related to the work, ensuring that all queries are resolved, all payments are made, and all adverse events are monitored. All processes are initially checked by the observer, the forms to be collected during the visit are prepared, an appointment request is created for the investigator, a pre-visit letter is written, necessary documents are gathered during the visit, and the storage location for the investigator\'s file is determined. There are no documents or materials related to the study left at the site. Subsequently, it involves writing the visit report and sending the follow-up letter.
