---
title: "What to write in a thank-you note to a new customer"
description: "30 thank-you notes for a B2B customer who just signed, grouped by deal size and by who signed, each short enough to write by hand on a postcard."
canonical: https://trysincerely.com/messages/new-customer-thank-you-note
last_updated: 2026-10-11
---
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# What to write in a thank-you note to a new customer

> 30 thank-you notes for a B2B customer who just signed, grouped by deal size and by who signed, each short enough to write by hand on a postcard.

Source: https://trysincerely.com/messages/new-customer-thank-you-note

Thank a new customer for the decision, not the purchase. Name the person who carried the deal, mention one moment from the sales process that only the two of you would know, and say what happens next. Send it in the week the contract is signed, before the kickoff call fills their calendar. Keep the upsell, the review request, and "welcome to the family" out of it.

![A postcard with a peach sunset picture lying on a closed laptop beside a paper coffee cup, on an oak table in a sunlit studio office with white brick walls.](https://trysincerely.com/images/messages/new-customer-thank-you-note.webp)

*Mail a new customer thank-you note in the week the contract is signed, so it lands before the kickoff call fills their calendar.*

## Who should get a note, and when

A signed deal usually has three kinds of people behind it. The champion argued for you in meetings you never saw. The economic buyer signed and now owns the risk. Procurement, legal, or security did slow, careful work that nobody thanks them for. Each one deserves a different note, and they should not arrive as three copies of the same card.

Timing matters more than polish. A note that lands three days after signature reads as gratitude. One that lands after the first invoice reads like part of the billing cycle.

Every example below is the message only, and each fits the default writing area of a Sincerely handwritten 4x6 postcard: about three lines, checked with every field at its longest likely value. Fields are written the way the Sincerely editor writes them. `{{first_name|there}}` prints a first name or, for a record with none, the word after the bar. `{{company}}` prints the account name. Fields starting with `custom.` are your own contact or company fields, and each one needs a fallback that reads well when the record is blank.

## A first customer, or a very early deal

Your first ten customers bought a product with rough edges. Tell them you know it.

1. `{{first_name|Hi}}`, you are our first customer. I will remember that for as long as this company exists. Thank you for the bet.
2. `{{first_name|Hello}}`, you signed before we had a logo page or a single case study. Thank you for trusting the people instead.
3. Hi `{{first_name|there}}`, our whole team of six read your signed order form out loud. Thank you for taking a chance on us.
4. `{{first_name|Hi}}`, thank you for buying something you could see was still half built. Your feedback will shape the other half.

## A small team that bought fast

When a five-person team decides in a week, they are trusting you to make the setup easy. Thank them for speed and keep the note light.

1. `{{first_name|Hi}}`, from first call to signature in `{{custom.days_to_close|under two weeks}}`. Thank you. We will match your pace on setup.
2. `{{first_name|Hello}}`, thank you for choosing us on a Tuesday and starting on a Wednesday. The kickoff agenda is already in your inbox.
3. Hi `{{first_name|there}}`, I liked how quickly your team made the call. Thank you, and send me the first thing that confuses you.
4. `{{first_name|Hi}}`, thanks for signing up the whole team at once. We will make the first week worth the decision.

## A mid-market contract after a full evaluation

These buyers compared you against two or three others. Name the part of the evaluation where they did the hard thinking.

1. `{{first_name|Hello}}`, your scoring sheet was the most thorough we have seen. Thank you for choosing us at the end of it.
2. `{{first_name|Hi}}`, thank you for running a fair pilot. Your team gave both vendors the same data, and that meant a lot to us.
3. Hi `{{first_name|there}}`, you asked us for three references and called all three. Thank you for doing the homework and for picking us.
4. `{{first_name|Hello}}`, thank you for choosing `{{custom.plan|our platform}}` after a long evaluation. Your shortlist was a tough one.

## An enterprise deal after a long procurement

Six months of security questionnaires and redlines wear everyone down. Thank them for the patience it took, and do not pretend it was quick.

1. `{{first_name|Hi}}`, eight months, two security reviews, and one reorg. Thank you for carrying this all the way to signature.
2. `{{first_name|Hello}}`, you kept this deal alive through a budget freeze. I know how many internal meetings that took. Thank you.
3. Hi `{{first_name|there}}`, thank you for answering our questions at 7 a.m. your time for a whole quarter. We start the rollout Monday.
4. `{{first_name|Hi}}`, `{{company}}` is the largest rollout we have taken on. Thank you for trusting us with it.

## The executive who signed

The signer took the risk on paper. Keep the note short and tell them what their decision starts.

1. `{{first_name|Hello}}`, thank you for signing. Your team's first working session is booked for `{{custom.kickoff_date|next week}}`.
2. `{{first_name|Hi}}`, thank you for backing your team's choice. I will report back on progress at 30 days so you never have to chase us.
3. Hi `{{first_name|there}}`, thank you for the signature and for the clear goal you set: `{{custom.goal|a faster close}}`. We will be measured on it.
4. `{{first_name|Hello}}`, thank you for putting your name on this. I take that seriously.

## Procurement, legal, and security reviewers

Almost nobody thanks the people who read your contract line by line. They tend to remember the one vendor who did.

1. `{{first_name|Hi}}`, thank you for a careful contract review. Your redlines made our standard agreement better, and we are keeping two of them.
2. `{{first_name|Hello}}`, `{{custom.security_questions|every one of the}}` security questions, answered and closed. Thank you for being fair in every round.
3. Hi `{{first_name|there}}`, thank you for getting the order form through finance before quarter end. I know you had other priorities.
4. `{{first_name|Hi}}`, thank you for your patience with our insurance certificate. Three versions later, it matches your template.

## A customer who came back

A returning customer already knows your weak spots. Thank them for a second look and name what changed.

1. `{{first_name|Hello}}`, thank you for giving us a second chance. The reporting you asked for two years ago is finally built.
2. `{{first_name|Hi}}`, it is good to work with `{{company}}` again. Thank you for coming back, and for telling us why you left.
3. Hi `{{first_name|there}}`, thank you for another look after last year. We fixed the import problem first, because you told us to.

## A customer who came from a referral

Two people get thanked here: the new customer, and the person who sent them. The second note goes in the [meeting thank-you examples](https://trysincerely.com/messages/thank-you-note-after-a-meeting).

1. `{{first_name|Hi}}`, `{{custom.referrer|a friend of yours}}` sent you our way. Thank you for listening, and for signing.
2. `{{first_name|Hello}}`, you signed on a colleague's word before you had seen much of us. We will try to make them look smart.
3. Hi `{{first_name|there}}`, you came to us through a customer we respect. Thank you for joining that group.

## Send new-customer notes from Sincerely

Sincerely has no trigger that fires when a deal closes, so you choose how each new customer reaches a note. For one account, use a one-off send from the Send button. Sincerely checks the address, the contact's frequency cap, and your credits before the piece is accepted, and tells you why if it cannot send.

For a month of new customers, upload the signed accounts as a [CSV](https://trysincerely.com/integrations/csv) and launch a Keep in touch campaign with an occasion such as "your first month with us." A Keep in touch note thanks or congratulates and asks for nothing: no offer and no call to action. When your [Salesforce](https://trysincerely.com/integrations/salesforce) or [HubSpot](https://trysincerely.com/integrations/hubspot) account is connected, the writer can cite the account's won deals and up to three CRM notes, so the thank-you rests on a record rather than a guess. You approve the design and launch it before anything prints.

Handwritten pieces are genuinely written by hand, as a 4x6 postcard or a letter. If a gift fits the deal better than a card, the [client gift note guide](https://trysincerely.com/guides/client-gift-note) and the [customer onboarding gifts guide](https://trysincerely.com/guides/customer-onboarding-gifts) cover what to send and what to write with it. The [customer marketing playbook](https://trysincerely.com/playbooks/customer-marketing) sets out the rest of the lifecycle, and when the first year comes around, the [customer renewal thank-you notes](https://trysincerely.com/messages/customer-renewal-thank-you-note) pick up the story.

## Related questions

- [Direct mail for customer marketing](https://trysincerely.com/playbooks/customer-marketing): Use physical mail for onboarding, champion thanks, advocacy, expansion, and renewal conversations, with careful account ownership and honest measurement.
- [What to write in a client gift note](https://trysincerely.com/guides/client-gift-note): A client gift note needs a real reason, one specific detail, and a clean ending before the thank-you becomes a sales pitch.
- [Customer onboarding gifts that make sense](https://trysincerely.com/guides/customer-onboarding-gifts): The best onboarding gifts arrive after the customer completes a milestone they can recognize, not when sales marks the deal closed.
- [What to write in a customer renewal thank-you note](https://trysincerely.com/messages/customer-renewal-thank-you-note): 30 renewal thank-you notes for B2B customers, from a first renewal to a renewal after a hard year, each short enough to write by hand.
- [What to write in a thank-you note after a meeting](https://trysincerely.com/messages/thank-you-note-after-a-meeting): 30 thank-you notes for after a B2B meeting, grouped by who you met, each short enough to be written by hand on a 4x6 postcard.
- [Referral thank-you note: what to write (31 examples)](https://trysincerely.com/messages/referral-thank-you-note): What to write to thank someone for a referral, sorted by who sent it. 31 short notes that say what happened next, each small enough for a handwritten postcard.

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Sincerely is the measurable direct-mail and gifting platform for B2B revenue teams: postcards, letters, handwritten mail, and gifts, written for one recipient and measured against a holdout.

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