diff --git a/contracts/nft-reward/src/errors.rs b/contracts/nft-reward/src/errors.rs
index c4c72f3..4dfbc53 100644
--- a/contracts/nft-reward/src/errors.rs
+++ b/contracts/nft-reward/src/errors.rs
@@ -17,8 +17,5 @@ pub enum NftErrorCode {
     NftNotTransferable = 11,
     NftLocked = 12,
     InvalidMetadata = 13,
-    InvalidTitle = 14,
-    InvalidDescription = 15,
-    InvalidImageUri = 16,
-    InvalidHuntTitle = 17,
+    MetadataFrozen = 14,
 }
diff --git a/contracts/nft-reward/src/lib.rs b/contracts/nft-reward/src/lib.rs
index 9acaa39..bf360ed 100644
--- a/contracts/nft-reward/src/lib.rs
+++ b/contracts/nft-reward/src/lib.rs
@@ -102,6 +102,7 @@ pub struct NftData {
     pub transferable: bool,
     pub minted_at: u64,
     pub locked: bool,
+    pub metadata_frozen: bool,
 }
 
 /// Event emitted when an NFT is minted.
@@ -143,6 +144,14 @@ pub struct NftMetadataUpdatedEvent {
     pub updater: Address,
 }
 
+/// Event emitted when an NFT's metadata is permanently frozen.
+#[contracttype]
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct NftMetadataFrozenEvent {
+    pub nft_id: u64,
+    pub owner: Address,
+}
+
 /// Event emitted when admin batch-updates image URIs across NFTs.
 #[contracttype]
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -600,6 +609,7 @@ impl NftReward {
             transferable,
             minted_at,
             locked: false,
+            metadata_frozen: false,
         };
 
         Storage::save_nft(&env, &nft_data);
@@ -731,7 +741,11 @@ impl NftReward {
             return Err(crate::errors::NftErrorCode::NotOwner);
         }
 
-        let new_description = Self::validate_metadata_field(
+        if nft.metadata_frozen {
+            return Err(crate::errors::NftErrorCode::MetadataFrozen);
+        }
+
+        let new_description = Self::sanitize_metadata_field(
             &env,
             &new_description,
             MAX_NFT_DESCRIPTION_BYTES,
@@ -752,6 +766,36 @@ impl NftReward {
         Ok(())
     }
 
+    /// Permanently freezes the NFT's metadata, preventing future updates. Owner only.
+    pub fn freeze_nft_metadata(
+        env: Env,
+        nft_id: u64,
+        owner: Address,
+    ) -> Result<(), crate::errors::NftErrorCode> {
+        owner.require_auth();
+
+        let mut nft =
+            Storage::get_nft(&env, nft_id).ok_or(crate::errors::NftErrorCode::NftNotFound)?;
+
+        if nft.owner != owner {
+            return Err(crate::errors::NftErrorCode::NotOwner);
+        }
+
+        if nft.metadata_frozen {
+            return Err(crate::errors::NftErrorCode::MetadataFrozen);
+        }
+
+        nft.metadata_frozen = true;
+        Storage::save_nft(&env, &nft);
+
+        env.events().publish(
+            (Symbol::new(&env, "NftMetadataFrozen"), nft_id),
+            NftMetadataFrozenEvent { nft_id, owner },
+        );
+
+        Ok(())
+    }
+
     /// Returns the total number of NFTs minted so far.
     pub fn total_supply(env: Env) -> u64 {
         Storage::get_nft_counter(&env)