Leave well: the letter, the notice, and the conversation.
A resignation letter you can hand in today, the notice question answered as questions to ask, and the three sentences for the meeting — including what to say when they counter-offer.
When do you want to hand it in, and when do you want to be gone?
How to write a resignation letter
The four lines that matter (date, statement, last day, name), with a sample you can send as it stands.
Notice period: what to ask, not what to assume
The questions to put to HR and the contract clauses to look for — we do not guess your local law.
The conversation, and the counter-offer
Three sentences for the meeting, and the standard answer that buys 24 hours without promising anything.
Handover that nobody can complain about
A one-page list built from what you actually own, and the goodbye message for the team.
Questions people ask first
Do I have to say why I am leaving?
No. A resignation letter states the fact and the last day; the reason is a conversation, not a document.
What if my notice period is longer than my new start date?
That is a negotiation with your manager, and the pack treats it as one: what to ask for, and what to offer in return.