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# 02 · Fire-and-forget with platform events
- URL: https://www.namastesalesforce.com/training/integration-patterns/fire-and-forget-platform-events/
- Published: 2025-11-18T09:00:00.000Z
- Updated: 2025-11-18T09:00:00.000Z
- Description: When the caller does not need an answer, publish an event and move on — decoupling, replay, and the delivery guarantees you actually get.
- Author: Swarnil Singhai
- Tags: Integration Patterns, #training, #duration-15m, #Import 2026-09-03 19:13

When the caller does not need an answer, publish an event and move on — decoupling, replay, and the delivery guarantees you actually get.

## At-least-once, not exactly-once

Platform events can be delivered more than once and subscribers can fall behind. Design subscribers to be idempotent and the guarantee becomes a feature, not a caveat.

## The replay Id is your safety net

External subscribers can resume from the last replay Id after a disconnect. Store it; the day your middleware restarts mid-stream you will be glad you did.

## Practice in your org

- Open your Developer Edition org and follow along step by step
- Change one thing at a time and note what happens
- When something breaks, read the error before searching for it