Google Tag Manager Expert Services

Facebook CAPI Event Deduplication Setup

Eliminate duplicate Meta conversions when running pixel and CAPI together

Fix duplicate conversion events in Meta Ads caused by running both Facebook Pixel and CAPI. We configure proper event deduplication to prevent inflated reporting.

200+
GTM Containers Audited
98%
Tracking Accuracy Rate
40+
Platforms Integrated
5★
Average Client Rating
Running both the Facebook Pixel and CAPI simultaneously is best practice — but without proper deduplication, every conversion gets counted twice, inflating your reported results and confusing your campaign optimisation. We configure the event_id parameter consistently between your browser pixel and server-side CAPI calls, verify deduplication is working correctly in Meta Events Manager, and audit your existing setup to identify any events currently being double-counted.

Ready to Get Your Tracking Set Up Properly?

What's Included in This Service

Everything you need for accurate, reliable tracking — delivered end-to-end.

event_id implementation in browser pixel and CAPI

Deduplication logic audit and diagnosis

Events Manager duplicate event identification

Fix for inflated conversion counts

Test event verification post-fix

Documentation of deduplication logic for your team

How We Work

Our proven 4-step process delivers results every time.

01

Discovery & Audit

We review your existing tracking setup, identify gaps and issues, and define the exact scope of work needed.

02

Implementation Plan

We design the data layer schema, tag architecture, and consent configuration before touching anything.

03

Build & QA

All tags, triggers, and variables are built in a GTM workspace and verified in Preview mode before publishing.

04

Verify & Handover

Test conversions, GA4 DebugView confirmation, and full documentation handed to your team.

Why Choose Adslytics?

Google Tag Manager Experts Only

Our GTM experts focus exclusively on GTM, GA4, and conversion tracking — not generalist digital marketing.

Data-Verified Results

Every implementation is cross-referenced against backend data — not just assumed to be working.

Full Documentation

You receive a complete implementation specification — not a black box you are dependent on us to maintain.

Fast Turnaround

Most setups and audits are delivered within 2–5 business days, not weeks.

What Our Clients Say

Real results from real businesses.

"Adslytics did a great job with our GA4 analysis and report. They were able to put complex analytics data into a very understandable document for our client. Highly recommend!"

Eric H.

Digital Agency Owner

"The team was quick with responses, very knowledgeable about issues, and helpful throughout the process. I appreciated their work habits and would hire Adslytics again."

Nick T.

Marketing Manager

"Adslytics is a very professional agency that managed our project successfully. They delivered exactly what was promised and I will definitely hire them again in the future!"

Hady M.

E-commerce Business Owner

Ready to Get Started with Facebook CAPI Event Deduplication Setup?

Get accurate conversion tracking that powers smarter ad decisions. Book a free 30-minute consultation.

Frequently Asked Questions

Meta uses the event_id parameter. When browser and server events arrive with the same event_id within a 48-hour window, Meta keeps only one and discards the duplicate.
Meta Events Manager shows a deduplication rate. If it's 0% but you're running both pixel and CAPI, something is wrong — either event_ids aren't matching or aren't being sent.
Sometimes. If the issue is only on the CAPI side, we can align event_ids there. But usually both sides need to share a consistent ID generation approach.
Duplicate conversions make your CPA look artificially low and your ROAS too high, which skews budget decisions. Fixing it gives you accurate data to optimise from.
Yes — deduplication works for all standard and custom events as long as event_id is implemented consistently.

Facebook CAPI Event Deduplication Setup — Done Right, First Time.

Stop losing revenue to broken tracking. Get it fixed today.

Talk to Us, It's Free

We are always willing to help. Let us know what you are looking for, and we will develop a unique solution for you.

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