> ## 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.
# How to Add Cross-Flow Exclusion Filters in Klaviyo
> Add cross-flow exclusion filters in Klaviyo so the same shopper can't enter multiple Upstack abandonment flows within overlapping windows — preventing over-emailing and duplicate sends.
## Why this Step Matters
The purpose of cross-flow exclusion filters is to **prevent someone from entering both the standard flow and the Upstack copy of the flow within a set timeframe.** This avoids overlapping or duplicate messages, ensuring a smoother customer experience, reducing message fatigue, and keeping your reporting data clean.
## Prerequisites
Before you start, you need:
* The **Klaviyo destination configured in Upstack Data**
* **Existing standard abandonment flows** in your Klaviyo account (Browse, Cart, Checkout, Site)
* The **Upstack copy of each abandonment flow** already cloned and renamed with the ` - Upstack Data` suffix ([learn how](/guides/klaviyo-abandonment-flows/how-to-clone-your-standard-flows-in-klaviyo))
* Admin (manager) access to the store's Klaviyo account
**Key terms used below:**
* **Standard flow** → the original abandonment flow in your Klaviyo account (for example, `Abandoned Cart`).
* **Upstack copy of the flow** → the cloned version triggered by Upstack Data's `*- Upstackified` events, named with the ` - Upstack Data` suffix (for example, `Abandoned Cart - Upstack Data`).
## Part 1: Add the exclusion filter to the standard flow
* Open the **standard flow** (for example, `Abandoned Cart`) in Klaviyo.
* Click the **Trigger** card at the top of the flow.
* Go to **Profile filters** and click **Edit**.
* Scroll to the bottom of the existing profile filters and click **+ AND**.
* Select the condition: **What someone has done (or not done)**.
* Choose **Person has** → **Received Email**.
* Set the count and timeframe: **zero times** → **in the last 7 days** *(or 14 days if preferred)*.
* Click **Where** and add: **Flow** **equals** the **Upstack copy of this flow**.
For example: `Flow equals Abandoned Cart - Upstack Data`.
Read as: **Has received email 0 times in last 7 days where Flow = `Abandoned Cart - Upstack Data`**.
* Click **Save**.
## Part 2: Add the reverse exclusion filter to the Upstack copy of the flow
* Open the **Upstack copy of the flow** (for example, `Abandoned Cart - Upstack Data`) in Klaviyo.
* Click the **Trigger** card at the top of the flow.
* Go to **Profile filters** and click **Edit**.
* Scroll to the bottom of the existing profile filters and click **+ AND**.
* Select the condition: **What someone has done (or not done)**.
* Choose **Person has** → **Received Email**.
* Set the count and timeframe: **zero times** → **in the last 7 days** *(or 14 days if preferred)*.
* Click **Where** and add: **Flow** **equals** the **standard flow**.
For example: `Flow equals Abandoned Cart`.
Read as: **Has received email 0 times in last 7 days where Flow = `Abandoned Cart`**.
* Click **Save**.
## Part 3: Verify both filters are in place
* On the **standard flow** trigger, confirm the profile filter references the **Upstack copy** name (for example, `Abandoned Cart - Upstack Data`).
* On the **Upstack copy of the flow** trigger, confirm the profile filter references the **standard flow** name (for example, `Abandoned Cart`).
* Spot-check a recipient profile after going live: confirm they only receive an email from one of the two flows within the 7-day window.
**Done 🎉** Repeat both Part 1 and Part 2 for **each** abandonment flow pair: Cart, Browse, Site, and Checkout.
For the full setup walkthrough, see [How to set up your Upstack abandonment flows in Klaviyo](/guides/klaviyo-abandonment-flows/complete-guide-to-setting-up-upstack-abandonment-flows-in-klaviyo).
**Need help or found an issue?**
If you encounter any issues or have questions while following this guide, reach out to us at **[support@upstackdata.com](mailto:support@upstackdata.com)**.