Dear member,
The information you have provided is insufficient. Whether inland or abroad, employees visit either potential clients or service existing clients. What risk(s) do you foresee from such visits, and what agreement would you like to have with the employee?
In the appointment letters, a clause on the non-disclosure of information is always inserted. In addition to this clause, what agreement would you like to have with the employee?
To protect the company's interests, identify what topics the employee can or cannot discuss with the client. Before the employee embarks on a visit, issue this letter on the company's letterhead.
While suggesting the above, let me caution you that making a legal agreement or issuing a letter could deter the employees, and they may not be able to perform their business activities freely.
Thanks,
Dinesh Divekar