diff --git a/pallets/certification/src/benchmarking.rs b/pallets/certification/src/benchmarking.rs
index 1109f97a30fcc08d4c6d05a116ebe70afa4f0881..7084dc11df8e9c979532c77bf63c282838110632 100644
--- a/pallets/certification/src/benchmarking.rs
+++ b/pallets/certification/src/benchmarking.rs
@@ -38,7 +38,7 @@ mod benchmarks {
     fn add_certs<T: Config>(i: u32, receiver: T::IdtyIndex) -> Result<(), &'static str> {
         Pallet::<T>::remove_all_certs_received_by(RawOrigin::Root.into(), receiver)?;
         for j in 1..i {
-            let _ = Pallet::<T>::do_add_cert_checked(j.into(), receiver, false);
+            Pallet::<T>::do_add_cert_checked(j.into(), receiver, false);
         }
         assert!(
             CertsByReceiver::<T>::get(receiver).len() as u32 == i - 1,
@@ -103,7 +103,7 @@ mod benchmarks {
         let receiver: T::IdtyIndex = 2.into();
         // try to add cert if missing, else ignore
         // this depends on initial data
-        let _ = Pallet::<T>::do_add_cert_checked(issuer, receiver, false);
+        Pallet::<T>::do_add_cert_checked(issuer, receiver, false);
 
         #[extrinsic_call]
         _(RawOrigin::Root, issuer, receiver);
@@ -154,7 +154,7 @@ mod benchmarks {
         let issuer: T::IdtyIndex = 1.into();
         let receiver: T::IdtyIndex = 0.into();
         Pallet::<T>::do_remove_cert(issuer, receiver, None);
-        let _ = Pallet::<T>::do_add_cert_checked(issuer, receiver, false);
+        Pallet::<T>::do_add_cert_checked(issuer, receiver, false);
         let block_number = T::ValidityPeriod::get();
         frame_system::pallet::Pallet::<T>::set_block_number(block_number);
 
diff --git a/pallets/certification/src/lib.rs b/pallets/certification/src/lib.rs
index 0f237cb51f16a0089620fd0a6c5678072d1a2975..56bf87f5ea301b9878f650179baf0e10ee2bd39e 100644
--- a/pallets/certification/src/lib.rs
+++ b/pallets/certification/src/lib.rs
@@ -360,21 +360,19 @@ pub mod pallet {
             issuer: T::IdtyIndex,
             receiver: T::IdtyIndex,
             verify_rules: bool,
-        ) -> Weight {
+        ) {
             let block_number = frame_system::pallet::Pallet::<T>::block_number();
 
             if verify_rules {
                 // only verify internal rules if asked
                 if let Err(e) = Self::check_add_cert_internal(issuer, receiver, block_number) {
                     sp_std::if_std! {println!("fail to force add cert: {:?}", e)}
-                    return T::WeightInfo::do_add_cert_checked();
                 }
             }
 
             if let Err(e) = Self::try_add_cert(block_number, issuer, receiver) {
                 sp_std::if_std! {println!("fail to force add cert: {:?}", e)}
             }
-            T::WeightInfo::do_add_cert_checked()
         }
 
         /// perform cert addition if not existing, else CertAlreadyExists
diff --git a/pallets/duniter-wot/src/lib.rs b/pallets/duniter-wot/src/lib.rs
index a3076f124d7442c98d04ca0233a8c57f64f236e2..4ff1bfce967a96adf41e485db0da43e89523d549 100644
--- a/pallets/duniter-wot/src/lib.rs
+++ b/pallets/duniter-wot/src/lib.rs
@@ -222,15 +222,9 @@ where
 
 // implement identity event handler
 impl<T: Config> pallet_identity::traits::OnNewIdty<T> for Pallet<T> {
-    fn on_created(idty_index: &IdtyIndex, creator: &IdtyIndex) -> Weight {
-        let mut weight = Weight::zero();
+    fn on_created(idty_index: &IdtyIndex, creator: &IdtyIndex) {
         // identity just has been created, a cert must be added
-        weight = weight.saturating_add(<pallet_certification::Pallet<T>>::do_add_cert_checked(
-            *creator,
-            *idty_index,
-            true,
-        ));
-        weight
+        <pallet_certification::Pallet<T>>::do_add_cert_checked(*creator, *idty_index, true);
     }
 }
 
diff --git a/pallets/identity/src/traits.rs b/pallets/identity/src/traits.rs
index ed8abc16a6a84bafaa3e23ef351cea4c00cfe8bd..65679ca7d804160b502475cb5faf25391b595d10 100644
--- a/pallets/identity/src/traits.rs
+++ b/pallets/identity/src/traits.rs
@@ -36,7 +36,7 @@ pub trait IdtyNameValidator {
 }
 
 pub trait OnNewIdty<T: Config> {
-    fn on_created(idty_index: &T::IdtyIndex, creator: &T::IdtyIndex) -> Weight;
+    fn on_created(idty_index: &T::IdtyIndex, creator: &T::IdtyIndex);
 }
 
 pub trait OnRemoveIdty<T: Config> {
@@ -47,10 +47,8 @@ pub trait OnRemoveIdty<T: Config> {
 #[impl_for_tuples(5)]
 #[allow(clippy::let_and_return)]
 impl<T: Config> OnNewIdty<T> for Tuple {
-    fn on_created(idty_index: &T::IdtyIndex, creator: &T::IdtyIndex) -> Weight {
-        let mut weight = Weight::zero();
-        for_tuples!( #( weight = weight.saturating_add(Tuple::on_created(idty_index, creator)); )* );
-        weight
+    fn on_created(idty_index: &T::IdtyIndex, creator: &T::IdtyIndex) {
+        for_tuples!( #( Tuple::on_created(idty_index, creator); )* );
     }
 }
 
diff --git a/pallets/quota/src/lib.rs b/pallets/quota/src/lib.rs
index 398f67aad1b52e46dd6e67e822899ed79fe48096..85d0a35e2a819a841f413e6d915f1a7337d8f139 100644
--- a/pallets/quota/src/lib.rs
+++ b/pallets/quota/src/lib.rs
@@ -339,12 +339,7 @@ fn is_eligible_for_refund<T: pallet_identity::Config>(_identity: IdtyId<T>) -> b
 
 // implement identity event handler
 impl<T: Config> pallet_identity::traits::OnNewIdty<T> for Pallet<T> {
-    fn on_created(idty_index: &IdtyId<T>, _creator: &T::IdtyIndex) -> Weight {
-        let mut weight = Weight::zero();
-        let mut add_db_reads_writes = |reads, writes| {
-            weight = weight.saturating_add(T::DbWeight::get().reads_writes(reads, writes));
-        };
-
+    fn on_created(idty_index: &IdtyId<T>, _creator: &T::IdtyIndex) {
         IdtyQuota::<T>::insert(
             idty_index,
             Quota {
@@ -352,8 +347,6 @@ impl<T: Config> pallet_identity::traits::OnNewIdty<T> for Pallet<T> {
                 amount: BalanceOf::<T>::zero(),
             },
         );
-        add_db_reads_writes(0, 1);
-        weight
     }
 }