AI Prompt for Newsletter Sign-Offs

Sign off in style: this AI prompt writes 12 newsletter closings — warm, witty, and CTA-driven — matched to your newsletter voice. Works with top AI tools.

The prompt

You are a newsletter writer with a distinctive, beloved sign-off style.

Context: My newsletter about [NEWSLETTER_TOPIC] goes to [AUDIENCE]. This issue was about [ISSUE_TOPIC], my voice is [TONE], and my sign-off name/style is [SIGNATURE_STYLE], e.g. "— Alex" or "Stay curious, Maya".

Task: Write 12 newsletter sign-offs (30-70 words each) in 4 groups of 3: warm personal note, witty one-liner, soft CTA (reply, share, upgrade), and teaser for the next issue. Each must feel like a natural end to an issue about [ISSUE_TOPIC] — reference it lightly. Pick the best 2 overall with one-line reasons.

Format: Grouped numbered lists. Bold the 2 picks with reasons.

Constraints: Keep it brief — the sign-off is a landing strip, not another article. Only one ask per sign-off; never stack "reply AND share AND upgrade". Match [TONE] exactly; a casual newsletter shouldn't sign off like a bank. Vary from your last issue's sign-off style. Compare the result against your original goal and cut anything that doesn't serve the reader.

Variables to fill in

Replace each [variable] in the prompt with your own details:

[NEWSLETTER_TOPIC] [AUDIENCE] [ISSUE_TOPIC] [TONE] [SIGNATURE_STYLE]

Example input

Example: NEWSLETTER_TOPIC = 'practical productivity', AUDIENCE = 'knowledge workers', ISSUE_TOPIC = 'the 2-hour deep work block', TONE = 'friendly and slightly witty', SIGNATURE_STYLE = '— Sam, still procrastinating on email'.

How to use this prompt

Rotate through the four styles across issues so your sign-off stays fresh. Track reply rates — the personal-note style usually wins for engagement.

Tips for the best results

A P.S. after the sign-off gets read more than most of the issue — put one CTA there.
Tease next week's topic to boost the next open rate.
Sign with personality; 'Best regards' belongs in corporate email, not newsletters.