Unique Session Identifier For Duplicate Clicks

Learn how Everflow's Unique Session Identifier helps track and manage duplicate clicks across marketing campaigns, allowing precise control over click tracking and preventing inflated performance metrics.

Overview

The Unique Session Identifier (which is a requirement to configure each Offer) determines how Everflow classifies clicks as either unique or duplicate.

Why It Matters:

Helps control duplicate clicks to prevent inflated metrics.
Can block or redirect duplicate clicks based on your settings.
Ensures accurate tracking and user experience.

By configuring this setting, you define how long a user’s click remains unique before being considered a duplicate.

How Unique Session Identifiers Work

Each Offer requires a Unique Session Identifier, which can be set to one of the following:

Cookie (Recommended)
GAID (Google Advertising ID)
IDFA (Apple Identifier for Advertisers)
IP Address
IP Address + User Agent

Recommended Settings:

Identifier: Cookie
Session Duration: 1
Time Interval: Days

Session Duration

Duration of duplicate click identification:

Cookies: Duration is unlimited but depends on browser storage rules.

Other identifiers (GAID, IDFA, IP Address, etc.): Max 180 days.

Example: Controlling Duplicate Clicks

Example: Setting a 24-Hour Session Duration

A user clicks an Offer and is redirected to the landing page.
If the same user clicks again within 24 hours, Everflow considers it a duplicate click.
Depending on your settings, the duplicate click will be either:
- Blocked → User sees a dead page.
- Redirected to Fail Traffic → Click is sent to another Offer.

How to Enable Duplicate Click Filtering

Navigate to the Offer Settings

Go to Offers -> Manage and select an Offer.

Scroll to the Tracking & Controls card and click Edit.

Enable Duplicate Click Filtering

Toggle Enable Duplicate Click Filter.

Choose what happens to duplicate clicks:

Block Clicks → The user sees a dead page.

Send to Fail Traffic → Redirects duplicate clicks to another Offer.

Heads Up! If Duplicate Click Filtering is NOT enabled, all clicks will go to the Offer and be counted as duplicates in reporting.

Duplicate Clicks with Smart Links

When a Smart Link routes traffic across multiple Offers, how a duplicate (non-unique) click is handled depends on whether Duplicate Click Filtering is enabled on the fallback Offer.

Both Offers have Duplicate Click Filtering enabled

Scenario: A Smart Link is set with priority — Offer A (filtering on), then Offer B (filtering on). A user with a fresh browser clicks the Smart Link.

Click 1 is detected as unique on the Smart Link and is redirected to Offer A.

Click 2 is detected as non-unique on the Smart Link and is not redirected to Offer A. It falls back to Offer B, but because the click is non-unique it is not redirected to Offer B either.

The click ends up on a dead page.

Fallback Offer has Duplicate Click Filtering disabled

Scenario: A Smart Link is set with priority — Offer A (filtering on), then Offer B (filtering off). A user with a fresh browser clicks the Smart Link.

Click 1 is detected as unique on the Smart Link and is redirected to Offer A.

Click 2 is detected as non-unique on the Smart Link and is not redirected to Offer A. It falls back to Offer B. Because Offer B does not filter duplicate clicks, the click is redirected (though it is still reported as non-unique).

If the same user then takes a tracking link to Offer A directly (not the Smart Link tracking link) and clicks it, the click is considered unique and goes through — because it is not using the Smart Link, and the uniqueness cookie was set using the Smart Link value.

Blocking Click Referrers (Redirect Mode)

You can remove the click referrer by setting up Single or Double Meta Refresh, found under the Tracking & Controls card > Redirect Mode inside an Offer.

A Meta Refresh uses a script that refreshes to itself and then refreshes onto your site, so no link is clicked from within the script and the referrer is removed.

All clicks are still tracked in Everflow, but not all clicks are redirected to the base destination URL, which can lead to a drop in Conversion Rate.

Heads Up!

This feature is known for increasing click discrepancies — typically 30-70% of clicks are dropped.

The amount dropped depends on the user's browser and browser settings (Safari consistently drops the most clicks).

It is suggested to run a short test during working hours so you can adjust the Redirect Mode if too many clicks are dropped.

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