[Line Manager’s name]
Dear [Line Manager]
Please accept this letter as my resignation from the position of [position] for [company name].
As detailed in my contract, my notice period is [notice period] which means that my last day with [company name] will be [date].
I would like to take this time to thank you personally for your help and support throughout my time in the company and would like to wish you, the team and [company name] the very best for the future.