diff --git a/polkadot/.github/workflows/check-licenses.yml b/polkadot/.github/workflows/check-licenses.yml
new file mode 100644
index 0000000000..929e9b2e6f
--- /dev/null
+++ b/polkadot/.github/workflows/check-licenses.yml
@@ -0,0 +1,26 @@
+name: Check licenses
+
+on:
+  pull_request:
+
+jobs:
+  check-licenses:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3.3.0
+      - uses: actions/setup-node@v3.6.0
+        with:
+          node-version: '16.19.0'
+          registry-url: 'https://npm.pkg.github.com'
+          scope: '@paritytech'
+      - name: Check the licenses
+        run: |
+          shopt -s globstar
+
+          npx @paritytech/license-scanner@0.0.3 scan \
+            --ensure-licenses Apache-2.0 \
+            --ensure-licenses GPL-3.0-only \
+            ./**/*.rs
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/polkadot/erasure-coding/benches/scaling_with_validators.rs b/polkadot/erasure-coding/benches/scaling_with_validators.rs
index d361c23537..c4834ecbab 100644
--- a/polkadot/erasure-coding/benches/scaling_with_validators.rs
+++ b/polkadot/erasure-coding/benches/scaling_with_validators.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion, Throughput};
 use polkadot_primitives::v2::Hash;
 use std::time::Duration;
diff --git a/polkadot/erasure-coding/fuzzer/src/reconstruct.rs b/polkadot/erasure-coding/fuzzer/src/reconstruct.rs
index ccc623b1ca..a388a55857 100644
--- a/polkadot/erasure-coding/fuzzer/src/reconstruct.rs
+++ b/polkadot/erasure-coding/fuzzer/src/reconstruct.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use polkadot_erasure_coding::*;
 use primitives::AvailableData;
 use honggfuzz::fuzz;
diff --git a/polkadot/erasure-coding/fuzzer/src/round_trip.rs b/polkadot/erasure-coding/fuzzer/src/round_trip.rs
index 1284e59f20..0d4507c98e 100644
--- a/polkadot/erasure-coding/fuzzer/src/round_trip.rs
+++ b/polkadot/erasure-coding/fuzzer/src/round_trip.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use polkadot_erasure_coding::*;
 use primitives::{AvailableData, BlockData, PoV};
 use std::sync::Arc;
diff --git a/polkadot/node/core/chain-api/src/tests.rs b/polkadot/node/core/chain-api/src/tests.rs
index e8323f0411..9289805cc8 100644
--- a/polkadot/node/core/chain-api/src/tests.rs
+++ b/polkadot/node/core/chain-api/src/tests.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use super::*;
 
 use futures::{channel::oneshot, future::BoxFuture};
diff --git a/polkadot/node/core/dispute-coordinator/src/scraping/candidates.rs b/polkadot/node/core/dispute-coordinator/src/scraping/candidates.rs
index 51a2eabce4..c84abc59c2 100644
--- a/polkadot/node/core/dispute-coordinator/src/scraping/candidates.rs
+++ b/polkadot/node/core/dispute-coordinator/src/scraping/candidates.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use polkadot_primitives::{BlockNumber, CandidateHash};
 use std::collections::{BTreeMap, HashMap, HashSet};
 
diff --git a/polkadot/node/core/provisioner/src/tests.rs b/polkadot/node/core/provisioner/src/tests.rs
index ed53f819b0..fb25129ca9 100644
--- a/polkadot/node/core/provisioner/src/tests.rs
+++ b/polkadot/node/core/provisioner/src/tests.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use super::*;
 use ::test_helpers::{dummy_candidate_descriptor, dummy_hash};
 use bitvec::bitvec;
diff --git a/polkadot/node/network/bridge/src/errors.rs b/polkadot/node/network/bridge/src/errors.rs
index 43ba61a589..ef7a307023 100644
--- a/polkadot/node/network/bridge/src/errors.rs
+++ b/polkadot/node/network/bridge/src/errors.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use polkadot_node_subsystem::SubsystemError;
 pub(crate) use polkadot_overseer::OverseerError;
 
diff --git a/polkadot/node/network/protocol/src/reputation.rs b/polkadot/node/network/protocol/src/reputation.rs
index 6a98efe1d0..be76eae16f 100644
--- a/polkadot/node/network/protocol/src/reputation.rs
+++ b/polkadot/node/network/protocol/src/reputation.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 pub use sc_network::ReputationChange;
 
 /// Unified annoyance cost and good behavior benefits.
diff --git a/polkadot/runtime/kusama/src/weights/xcm/mod.rs b/polkadot/runtime/kusama/src/weights/xcm/mod.rs
index ac45a98bcf..e05998e33e 100644
--- a/polkadot/runtime/kusama/src/weights/xcm/mod.rs
+++ b/polkadot/runtime/kusama/src/weights/xcm/mod.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 mod pallet_xcm_benchmarks_fungible;
 mod pallet_xcm_benchmarks_generic;
 
diff --git a/polkadot/runtime/rococo/src/weights/xcm/mod.rs b/polkadot/runtime/rococo/src/weights/xcm/mod.rs
index bd3c528fa5..861941b97a 100644
--- a/polkadot/runtime/rococo/src/weights/xcm/mod.rs
+++ b/polkadot/runtime/rococo/src/weights/xcm/mod.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 mod pallet_xcm_benchmarks_fungible;
 mod pallet_xcm_benchmarks_generic;
 
diff --git a/polkadot/runtime/westend/src/weights/xcm/mod.rs b/polkadot/runtime/westend/src/weights/xcm/mod.rs
index 834f908938..9c9e49f75a 100644
--- a/polkadot/runtime/westend/src/weights/xcm/mod.rs
+++ b/polkadot/runtime/westend/src/weights/xcm/mod.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 mod pallet_xcm_benchmarks_fungible;
 mod pallet_xcm_benchmarks_generic;
 
diff --git a/polkadot/statement-table/src/lib.rs b/polkadot/statement-table/src/lib.rs
index ba4d1a1163..4eb5ff3cd0 100644
--- a/polkadot/statement-table/src/lib.rs
+++ b/polkadot/statement-table/src/lib.rs
@@ -1,3 +1,16 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
 // You should have received a copy of the GNU General Public License
 // along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
 
diff --git a/polkadot/utils/staking-miner/tests/cli.rs b/polkadot/utils/staking-miner/tests/cli.rs
index ebd5380f04..fc26da98ab 100644
--- a/polkadot/utils/staking-miner/tests/cli.rs
+++ b/polkadot/utils/staking-miner/tests/cli.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 use assert_cmd::{cargo::cargo_bin, Command};
 use serde_json::{Result, Value};
 
diff --git a/polkadot/xcm/pallet-xcm-benchmarks/src/generic/mod.rs b/polkadot/xcm/pallet-xcm-benchmarks/src/generic/mod.rs
index d60081c191..8fee41142f 100644
--- a/polkadot/xcm/pallet-xcm-benchmarks/src/generic/mod.rs
+++ b/polkadot/xcm/pallet-xcm-benchmarks/src/generic/mod.rs
@@ -1,3 +1,19 @@
+// Copyright 2017-2023 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
 pub use pallet::*;
 
 #[cfg(feature = "runtime-benchmarks")]