Draft template     

Private and Confidential 

Dear 

Re: Your resignation 

Following the incident on [insert date] with [insert name] which concluded in you leaving the premises and stating that you have resigned, I am writing to clarify the situation. I believe that the above resignation happened in the heat of the moment and was not carefully considered by you. I would like to arrange a meeting with you to discuss your decision further and clarify any issues or concerns you have. Please contact me to arrange this within [insert number] days of receipt of this letter. If I do not hear from you by [insert date], I will have no other option than to accept your resignation and will send your P45 and outstanding payments to your home address. I look forward to hearing from you shortly. 

Yours sincerely