diff --git a/pallets/certification/src/lib.rs b/pallets/certification/src/lib.rs
index 857f7e01157b814f58930095b927ea3f20355c3d..85abc2f3b99e97d3caad459903b59f945760fae8 100644
--- a/pallets/certification/src/lib.rs
+++ b/pallets/certification/src/lib.rs
@@ -210,6 +210,7 @@ pub mod pallet {
     #[pallet::generate_deposit(pub(super) fn deposit_event)]
     pub enum Event<T: Config<I>, I: 'static = ()> {
         /// New certification
+        /// [issuer, issuer_issued_count, receiver, receiver_received_count]
         NewCert {
             issuer: T::IdtyIndex,
             issuer_issued_count: u8,
@@ -217,6 +218,7 @@ pub mod pallet {
             receiver_received_count: u32,
         },
         /// Removed certification
+        /// [issuer, issuer_issued_count, receiver, receiver_received_count, expiration]
         RemovedCert {
             issuer: T::IdtyIndex,
             issuer_issued_count: u8,
@@ -225,6 +227,7 @@ pub mod pallet {
             expiration: bool,
         },
         /// Renewed certification
+        /// [issuer, receiver]
         RenewedCert {
             issuer: T::IdtyIndex,
             receiver: T::IdtyIndex,