---
title: "What does the RevenueDot webhook event INVOICE_ISSUANCE mean?"
description: "INVOICE_ISSUANCE is accepted in a webhook filter but RevenueDot never sends it, because only RevenueCat Billing issues invoices."
url: https://revenuedot.app/docs/webhooks/webhook-invoice-issuance
---

# What does the RevenueDot webhook event INVOICE_ISSUANCE mean?

The RevenueDot webhook event INVOICE_ISSUANCE is never sent, because RevenueDot does not issue invoices.

## Quick facts

| | |
|---|---|
| Event | `INVOICE_ISSUANCE` |
| Where | RevenueDot webhook (`event.type`), RevenueCat's webhook format |
| Sent to | No webhook: it is never sent |
| Fields that are specific to it | none |
| What it means | A RevenueCat event type for an invoice issued by RevenueCat Billing. RevenueDot accepts it in a webhook's `event_types` filter and never sends it. |

## When it is sent

- RevenueCat sends it when RevenueCat Billing issues an invoice.
- RevenueDot has no invoicing product, so nothing produces the event.
- A web checkout on Stripe sends Stripe's own invoice emails and events, not this one.

## What your server should do

1. Do not wait for this event.
2. If you migrate from RevenueCat and used it, take invoices from Stripe's own webhooks instead.
3. Keep a no-op case for it if you share a handler between both systems.
4. Deduplicate on `event.id`: deliveries can repeat, because anything but HTTP 200 is retried after 5, 10, 20, 40 and 80 minutes.

## Example

```javascript
import { createHmac, timingSafeEqual } from "node:crypto";

// X-RevenueCat-Webhook-Signature: t=<unix seconds>,v1=<hex HMAC-SHA256 of "<t>.<raw body>">
function verify(rawBody, header, secret, toleranceSeconds = 300) {
  const m = /^t=(\d+),v1=([0-9a-f]{64})$/.exec(header ?? "");
  if (!m || Math.abs(Date.now() / 1000 - Number(m[1])) > toleranceSeconds) return false;
  const expected = createHmac("sha256", secret).update(`${m[1]}.${rawBody}`).digest();
  return timingSafeEqual(expected, Buffer.from(m[2], "hex"));
}

// Sign a sample delivery the way RevenueDot does, then handle it.
const secret = "whsec_test_secret";
const rawBody = JSON.stringify({ api_version: "1.0", event: {"id":"66339910-3BFF-49F4-B873-D1283D673DE2","type":"INVOICE_ISSUANCE","app_user_id":"user_1","product_id":"pro_monthly"} });
const t = Math.floor(Date.now() / 1000);
const header = `t=${t},v1=${createHmac("sha256", secret).update(`${t}.${rawBody}`).digest("hex")}`;

const seen = new Set(); // use a database table in production

function handle(rawBody, header) {
  if (!verify(rawBody, header, secret)) return "401 bad signature";
  const { event } = JSON.parse(rawBody);
  if (seen.has(event.id)) return "200 duplicate";
  seen.add(event.id);
  if (event.type !== "INVOICE_ISSUANCE") return "200 ignored";
  return "no-op, RevenueDot never sends this";
}

console.log(handle(rawBody, header));
```

*Run-checked: `npm run check:snippets` runs this snippet with Node and compares its output with `no-op` (checked 2026-10-03).*

## How RevenueDot produces it

The type is in `EVENT_TYPES` so a filter that names it is valid, and in `NEVER_SENT_EVENT_TYPES` so nothing produces it.

## Related

- [What does the RevenueDot webhook event TEMPORARY_ENTITLEMENT_GRANT mean?](https://revenuedot.app/docs/webhooks/webhook-temporary-entitlement-grant.md)
- [What does the RevenueDot webhook event INITIAL_PURCHASE mean?](https://revenuedot.app/docs/webhooks/webhook-initial-purchase.md)
- [What does the RevenueDot webhook event TEST mean?](https://revenuedot.app/docs/webhooks/webhook-test.md)
- [Which webhook events RevenueDot sends, and the two it never sends](https://revenuedot.app/docs/api/webhook-events.md)
- [Webhooks guide: set up, verify and test](https://revenuedot.app/docs/guides/webhooks.md)

## Source

- [RevenueDot docs: which webhook events RevenueDot sends](https://revenuedot.app/docs/api/webhook-events)
- [RevenueCat: webhook event types and fields (the format RevenueDot follows)](https://www.revenuecat.com/docs/integrations/webhooks/event-types-and-fields)
- [RevenueDot core: events.ts (the event types and the rules that derive them)](https://github.com/revenuedot/revenuedot/blob/main/packages/core/src/events.ts)

Checked: 2026-10-03