diff --git a/pom.xml b/pom.xml
index 05aaeaa..346c957 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
 
 	<groupId>it.eng.dome</groupId>
 	<artifactId>search</artifactId>
-	<version>1.5.0</version>
+	<version>1.5.1</version>
 	<name>Search and Browsing</name>
 	<description>Demo for DOME Project</description>
 
diff --git a/release_note.md b/release_note.md
index 084e8f9..4afd495 100644
--- a/release_note.md
+++ b/release_note.md
@@ -2,6 +2,10 @@
 
 **Release Notes** for the *Search*:
 
+### <code>1.5.1</code>
+**Bug Fix**
+* Data Normalization: Resolved an inconsistency in the normalization logic within the ResultProcessor. By ensuring uniform handling of strings (specifically case-insensitive transformation) during the retrieval phase, the system now guarantees accurate and predictable sorting for the name field.
+
 ### <code>1.5.0</code>
 **Improvement**
 * Dynamic Sorting: Implemented support for dynamic search result sorting. The SearchProduct and SearchProvider APIs now support sorting parameters via query string (e.g., ?sort=field,asc/desc).
diff --git a/src/main/java/it/eng/dome/search/config/IndexInitializer.java b/src/main/java/it/eng/dome/search/config/IndexInitializer.java
new file mode 100644
index 0000000..f8be665
--- /dev/null
+++ b/src/main/java/it/eng/dome/search/config/IndexInitializer.java
@@ -0,0 +1,39 @@
+package it.eng.dome.search.config;
+
+import it.eng.dome.search.domain.IndexingObject;
+import it.eng.dome.search.domain.ProviderIndex;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
+import org.springframework.data.elasticsearch.core.IndexOperations;
+import org.springframework.data.elasticsearch.core.document.Document;
+
+import javax.annotation.PostConstruct;
+
+@Configuration
+public class IndexInitializer {
+
+    private final ElasticsearchOperations elasticsearchOperations;
+    private final Logger logger = LoggerFactory.getLogger(IndexInitializer.class);
+
+    public IndexInitializer(ElasticsearchOperations elasticsearchOperations) {
+        this.elasticsearchOperations = elasticsearchOperations;
+    }
+
+    @PostConstruct
+    public void configureIndices() {
+        setupIndex(IndexingObject.class);
+        setupIndex(ProviderIndex.class);
+    }
+
+    private void setupIndex(Class<?> clazz) {
+        IndexOperations indexOps = elasticsearchOperations.indexOps(clazz);
+        if (!indexOps.exists()) {
+            String jsonSettings = "{\"analysis\": {\"normalizer\": {\"lowercase_normalizer\": {\"type\": \"custom\",\"filter\": [\"lowercase\"]}}}}";
+            indexOps.create(Document.parse(jsonSettings));
+            indexOps.putMapping(indexOps.createMapping(clazz));
+            logger.info("Indice per {} creato con normalizer personalizzato.", clazz.getSimpleName());
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/it/eng/dome/search/domain/IndexingObject.java b/src/main/java/it/eng/dome/search/domain/IndexingObject.java
index 9d124f2..d7550c8 100644
--- a/src/main/java/it/eng/dome/search/domain/IndexingObject.java
+++ b/src/main/java/it/eng/dome/search/domain/IndexingObject.java
@@ -33,7 +33,7 @@ public class IndexingObject {
 	@Field(type = FieldType.Text)
 	private String productOfferingDescription;
 
-	@Field(type = FieldType.Keyword)
+	@Field(type = FieldType.Keyword, normalizer = "lowercase_normalizer")
 	private String productOfferingName;
 
 	@Field(type = FieldType.Text)
diff --git a/src/main/java/it/eng/dome/search/domain/ProviderIndex.java b/src/main/java/it/eng/dome/search/domain/ProviderIndex.java
index 0754c83..1186dfb 100644
--- a/src/main/java/it/eng/dome/search/domain/ProviderIndex.java
+++ b/src/main/java/it/eng/dome/search/domain/ProviderIndex.java
@@ -22,7 +22,7 @@ public class ProviderIndex {
     @Id
     protected String id;
 
-    @Field(type = FieldType.Keyword)
+    @Field(type = FieldType.Keyword, normalizer = "lowercase_normalizer")
     private String tradingName;
 
     @Field(type = FieldType.Text)