Dear Farah,
You must have seen all the posts wherein members have given their viewpoints and opinions and familiarized yourself with the following, which will be useful to you:
- Sexual harassment - what constitutes
- Departmental enquiry - how to conduct
- Written complaint - a must for initiating action
- Principles of natural justice - the other person to be given a chance to be heard
- Due process - the legal process of going about the whole thing
- Punishment - quantum depends on the seriousness of the act, etc.
Correct me if I am wrong, but it seems you are new to HR, and your organization does not have a well-laid-out disciplinary procedure.
First of all, the term "misbehavior" that you have used is vague. It means "to behave badly," "to behave (oneself) in an inappropriate way," or "improper, rude, or uncivil behavior." Not wishing a lady, not standing when she enters, not pulling out a chair for her, arguing loudly, etc., can all be termed "misbehavior"; but these are not punishable. There can be certain misdemeanors that need not be escalated.
So, you have to first tell the members what exactly you mean by misbehavior and the incident along with the actual words used.
Secondly, in the official world, the word that entails any punitive action is "misconduct." Misconduct refers to those severe acts of misbehavior that entail penal action by the management. In industrial establishments, "misconducts" are specifically spelled out in the Standing Orders. For example, "sleeping while on duty," "reporting to work in an inebriated condition," "threatening members of staff or management with dire consequences," etc.
In the instant case, you have to ascertain from the concerned lady what exactly was the misbehavior. Then decide on the merits of the accusation (here, you have already pre-meditated to punish the perpetrator) if it needs escalation to be taken cognizance of.
In that case, you'll have to take a written complaint. You cannot take action just on hearsay (unless it is a sub-standard company with no people policy). You have to remember that the other person also has a right to be heard and explain his side of the story. Else, the action will be termed arbitrary and unlawful, and the person can sue the company.
Regards.