diff --git a/.github/workflows/check-certificates.yml b/.github/workflows/check-certificates.yml
deleted file mode 100644
index fdb6d2c9..00000000
--- a/.github/workflows/check-certificates.yml
+++ /dev/null
@@ -1,105 +0,0 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-certificates.md
-name: Check Signing Certificates
-
-# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
-on:
-  push:
-    paths:
-      - ".github/workflows/check-certificates.ya?ml"
-      - "certs/**"
-  pull_request:
-    paths:
-      - ".github/workflows/check-certificates.ya?ml"
-      - "certs/**"
-  schedule:
-    # Run every 10 hours.
-    - cron: "0 */10 * * *"
-  workflow_dispatch:
-  repository_dispatch:
-
-env:
-  # Begin notifications when there are less than this many days remaining before expiration.
-  EXPIRATION_WARNING_PERIOD: 30
-
-jobs:
-  get-certificates-list:
-    runs-on: ubuntu-latest
-    outputs:
-      certificates: ${{ steps.get-files.outputs.certificates }}
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Set certificates path environment variable
-        run: |
-          # See: https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
-          echo "FILES=\"$(ls ${{ github.workspace }}/certs/* | xargs | sed 's/ /","/g')\"" >> $GITHUB_ENV
-
-      - name: Get files list
-        id: get-files
-        run: |
-          JSON=$(echo '[${{ join(env.FILES) }}]' | jq -c '{"cert_file": .}')
-          echo "::set-output name=certificates::$JSON"
-
-  check-certificates:
-    name: ${{ matrix.cert_file }}
-    needs: get-certificates-list
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix: ${{fromJSON(needs.get-certificates-list.outputs.certificates)}}
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Get days remaining before certificate expiration date
-        id: get-days-before-expiration
-        run: |
-          EXPIRATION_DATE="$(
-            (
-              openssl x509 \
-                -inform der \
-                -in ${{ matrix.cert_file }} \
-                -enddate -noout
-            ) | (
-              grep \
-                --max-count=1 \
-                --only-matching \
-                --perl-regexp \
-                'notAfter=(\K.*)'
-            )
-          )"
-
-          DAYS_BEFORE_EXPIRATION="$((($(date --utc --date="$EXPIRATION_DATE" +%s) - $(date --utc +%s)) / 60 / 60 / 24))"
-
-          # Display the expiration information in the log.
-          echo "Certificate expiration date: $EXPIRATION_DATE"
-          echo "Days remaining before expiration: $DAYS_BEFORE_EXPIRATION"
-
-          echo "::set-output name=days::$DAYS_BEFORE_EXPIRATION"
-
-      - name: Check if expiration notification period has been reached
-        id: check-expiration
-        run: |
-          DAYS=${{ steps.get-days-before-expiration.outputs.days }}
-          if [[ $DAYS -lt ${{ env.EXPIRATION_WARNING_PERIOD }} ]]; then
-            echo "::error::${{ matrix.cert_file }} will expire in $DAYS days!!!"
-            exit 1
-          fi
-
-      - name: Slack notification of pending certificate expiration
-        # Only run when the workflow will have access to the certificate secrets.
-        if: >
-          failure() &&
-          github.event_name == 'schedule'
-        env:
-          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-          SLACK_MESSAGE: |
-            :warning::warning::warning::warning:
-            WARNING: ${{ github.repository }} ${{ matrix.cert_file }} will expire in ${{ steps.get-days-before-expiration.outputs.days }} days!!!
-            :warning::warning::warning::warning:
-          SLACK_COLOR: danger
-          MSG_MINIMAL: true
-        uses: rtCamp/action-slack-notify@v2
diff --git a/certs/AddTrustExternalCA_Root.cer b/certs/AddTrustExternalCA_Root.cer
deleted file mode 100644
index f61f3d57..00000000
Binary files a/certs/AddTrustExternalCA_Root.cer and /dev/null differ
diff --git a/certs/BaltimoreCyberTrust_Root.cer b/certs/BaltimoreCyberTrust_Root.cer
deleted file mode 100644
index da96dbb2..00000000
Binary files a/certs/BaltimoreCyberTrust_Root.cer and /dev/null differ
diff --git a/certs/Digicert_Root.cer b/certs/Digicert_Root.cer
deleted file mode 100644
index dae01965..00000000
Binary files a/certs/Digicert_Root.cer and /dev/null differ
diff --git a/certs/GeoTrustGlobalCA_Root.cer b/certs/GeoTrustGlobalCA_Root.cer
deleted file mode 100644
index 4ae42e81..00000000
Binary files a/certs/GeoTrustGlobalCA_Root.cer and /dev/null differ
diff --git a/certs/GeoTrustPrimaryCertificationAuthority-G3.cer b/certs/GeoTrustPrimaryCertificationAuthority-G3.cer
deleted file mode 100644
index 94c5cdad..00000000
Binary files a/certs/GeoTrustPrimaryCertificationAuthority-G3.cer and /dev/null differ
diff --git a/certs/GoDaddyRootCertificateAuthority-G2.cer b/certs/GoDaddyRootCertificateAuthority-G2.cer
deleted file mode 100644
index 3cdad666..00000000
Binary files a/certs/GoDaddyRootCertificateAuthority-G2.cer and /dev/null differ
diff --git a/certs/VeriSignClass3PublicPrimaryCertificationAuthority-G5.cer b/certs/VeriSignClass3PublicPrimaryCertificationAuthority-G5.cer
deleted file mode 100644
index 9818d19d..00000000
Binary files a/certs/VeriSignClass3PublicPrimaryCertificationAuthority-G5.cer and /dev/null differ
diff --git a/docs/usage.md b/docs/usage.md
index 2da6cb42..26d8f98d 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -83,6 +83,9 @@ previous certificates are going to be erased. To overcome this it's required to
 ./arduino-fwuploader certificates flash --url arduino.cc:443,google.com:443 --file ~/Downloads/my_self_signed_.der -b arduino:mbed_nano:nanorp2040connect -a /dev/ttyACM0
 ```
 
+You can find the certificates that are preflashed on the NINA module
+[here](https://github.com/arduino/nina-fw/blob/master/data/roots.pem).
+
 ### Command line options
 
 The full list of command line options can be obtained with the `-h` option: `./arduino-fwuploader -h`