Dear Sanjfer,
The word "memo" is derived from the word "memorandum." It means a written proposal or reminder. Nevertheless, either word has a negative connotation. Memorandums are issued to handle matters of discipline or indiscipline. However, a memo is issued to an individual and cannot have the stature of a general circular.
Now coming to your post. What exactly is the challenge? Are the employees misbehaving? Is there a challenge of the lack of interpersonal skills among the staff members?
If just by issuing a memo the behavior of the staff were to be improved, then life would be far easier. However, that is not the case. You need to build a culture of respect, etiquette, teamwork, and a healthy interpersonal environment. To do all this, you need to train your staff intensively. Secondly, induction training also plays a vital role. If after doing all this, when a few staff members show defiant behavior, you can issue a memo to those members only. In such a case, there is no need to issue a general notice.
Thanks,
Dinesh Divekar