> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Events are delivered but the destination reports 0 conversions or a low match rate

> Events delivered but Meta or TikTok reports zero conversions? Event mapping is likely misconfigured. Verify Upstack events map to the right destination events and required parameters are present.

**Likely cause:** Event mapping is misconfigured — the events Upstack sends don't match the conversion events the destination expects, or required parameters are missing.

**Fix:**

1. Go to **Destinations** → click the destination → **Event Mapping** tab.
2. Verify that Upstack events are mapped to the correct destination events. For example:
   * `Purchase` → Meta's `Purchase` (not `AddToCart`)
   * `AddToCart` → TikTok's `AddToCart` (case-sensitive)
   * `PageView` → GA4's `page_view`
3. Check that required parameters are mapped — most Conversion APIs require `event_time`, `event_source_url`, and at least one identity field (email or phone).
4. For Meta CAPI: open Meta Events Manager → **Test Events** tab and compare the parameters Upstack sends against what Meta expects.
5. Save any mapping changes and monitor the event log for the next 15 minutes.

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**Still stuck?** Contact [support@upstackdata.com](mailto:support@upstackdata.com) with your Pixel ID and a description of the issue. We typically respond within a few hours.