---
title: "The boundaries of exactly-once guarantees"
description: "How can you state exactly-once boundaries between a broker and business effects?"
status: "coming-soon"
language: "en"
canonical: "https://bulnik.dev/en/articles/topics/T22.03/"
topicId: "T22.03"
---

> Coming soon — this article is being prepared. Below are its question, intended outcome, and place in the story.

## The question

How can you state exactly-once boundaries between a broker and business effects?

## What we will work through

State exactly-once boundaries between a broker and business effects.

## Before you begin

Previously covered: At-most-once and at-least-once in one scenario; Inbox and processing deduplication.

- [At-most-once and at-least-once in one scenario](/en/articles/topics/T22.02/)
- [Inbox and processing deduplication](/en/articles/topics/T22.05/)