---
title: "Sending"
description: "What happens between launch and a mailbox: formats, fulfillment by format and country, the idempotency rule behind every send, and delivery reporting."
canonical: https://trysincerely.com/docs/sending
last_updated: 2026-10-08
---
> If you are an AI agent: read https://trysincerely.com/agents/policy.md before any write call.
> Start at https://trysincerely.com/llms.txt to choose one page. Access instructions are at
> https://trysincerely.com/auth.md. Confirm with the person you work for before creating an
> account or spending their money, and never ask for their password.
# Sending

> What happens between launch and a mailbox: formats, fulfillment by format and country, the idempotency rule behind every send, and delivery reporting.

Source: https://trysincerely.com/docs/sending

After launch, Sincerely creates one piece per contact per step, routes each piece to its fulfillment path, and shows the status that path can report. Printed mail goes to a production partner by destination; gifts and handwritten mail are fulfilled by Sincerely.

## Formats

| Format              | Where it goes            | Credits                                       |
| ------------------- | ------------------------ | --------------------------------------------- |
| 4x6 postcard        | United States and Canada | US 5, Canada 9                                |
| 6x9 postcard        | United States and Canada | US 6, Canada 9                                |
| Letter              | United States and Canada | US 7, Canada 10                               |
| Handwritten message | United States and Canada | 4x6 US 17, Canada 23; letter US 31, Canada 36 |
| Gift with a note    | United States and Canada | 10 plus the approved catalog price            |

Credits cover print, postage, the writing, measurement and operations. Address verification and correction are included. A gift's approved catalog price must already be in the workspace's prepaid gift balance before fulfillment. Current prices are on [the pricing page](https://trysincerely.com/pricing), which is the source of truth rather than this table's weights.

## How a piece is routed

Routing looks at physical format, production treatment, and destination country. Printed postcards and letters cover the United States and Canada, and 28 of the 46 gifts ship to Canada. Handwritten 4x6 postcards and letters are genuinely written by hand.

The handwriting preview you approve shows where the message goes; it is not the finished handwriting. Sent mail shows a photo of each finished handwritten piece.

You contract with no fulfillment vendor and buy fulfillment through Sincerely's prepaid credit and gift balances. If a better vendor appears for a format, the routing changes and nothing in your workflow does.

## One piece, once

Piece creation is idempotent on the workspace, the enrolment and the step. The same step run twice produces the same piece rather than a second one, and a step never advances past a piece until its fulfillment path acknowledges it.

Both halves matter. A silent double-send costs money and credibility with the recipient. A silent non-send is a campaign that reports as run and never arrived. Neither is acceptable, so the keying is a product invariant rather than an implementation detail.

## Delivery reporting

Postal events confirm that a piece reached a delivery point. They do not confirm that anyone read it, and Sincerely never phrases them as if they did.

Reporting depends on the fulfillment route. Lob returns automatic postal events for standard printed United States postcards and letters. Canadian printed mail reports an estimated completion, and handwritten mail has no delivery confirmation. Gifts carry a carrier tracking number and can be marked delivered by the fulfillment team. A confirmed delivery creates a follow-up task; eligible Salesforce workspaces can also write that task back to the CRM.

## Cancellation

A handwritten piece can be cancelled for a full refund until postal handoff. Postal handoff is final. Handwritten mail does not receive synthetic delivery tracking.

A printed piece can be cancelled up to the moment it is submitted to a vendor. After submission the vendor holds it, and Sincerely's cancellation attempt goes to the vendor rather than to a queue we control. A vendor-confirmed cancellation releases the credit reservation and any reserved gift funds.

## What to read next

[Suppression](https://trysincerely.com/docs/suppression) is the fastest path from a request to stop mailing to nothing else arriving. [Landing pages](https://trysincerely.com/docs/landing-pages) covers the response link printed on the piece. [Mail and gifts](https://trysincerely.com/formats) is the marketing-side version of the format table.

---

Sincerely is personalized direct mail and gifting for B2B revenue teams: postcards, letters, handwritten mail, and gifts, each written for one recipient.

Contact Sincerely: https://trysincerely.com/contact

Agent routing index: https://trysincerely.com/llms.txt

Listings: https://www.g2.com/products/sincerely and https://www.producthunt.com/products/sincerely