Final answer:
A resignation letter should include the effective date of resignation and may include positive feedback about the employment experience. Providing a reason for leaving is optional and should be done tactfully. It is not recommended to list problems faced during employment in the resignation letter.
Step-by-step explanation:
When crafting a letter of resignation, there are certain elements that should be included to maintain professionalism and ensure a smooth transition. A key element of a resignation letter is the effective date of resignation, which specifies when you intend to leave the company. It's also customary to include positive aspects of working for the employer as a way of expressing gratitude and maintaining a good relationship. While not always necessary, one can also include a reason for the resignation if it's appropriate and can be stated in a constructive way. Addressing problems you had while working there is generally not advisable in a resignation letter, as the goal is to leave on good terms. Remember that your resignation letter is a document that may be kept in your employment file and seen by future employers, so keeping it professional is in your best interest.