diff --git a/openapi/openapi.json b/openapi/openapi.json
index f69f0b2..5b75bd3 100644
--- a/openapi/openapi.json
+++ b/openapi/openapi.json
@@ -667,7 +667,7 @@
         "tags": [
           "Creditor Institutions"
         ],
-        "summary": "Get the list of creditor institutions associated to a station",
+        "summary": "Get the list of creditor institutions that can be associated to a station",
         "operationId": "getStationCreditorInstitutions",
         "parameters": [
           {
@@ -678,6 +678,20 @@
             "schema": {
               "type": "string"
             }
+          },
+          {
+            "name": "ciTaxCodeList",
+            "in": "query",
+            "description": "List of Creditor Institution's tax code, restrict the research to this tax code list only",
+            "required": true,
+            "schema": {
+              "maxItems": 10,
+              "minItems": 0,
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
           }
         ],
         "responses": {
@@ -696,7 +710,7 @@
                 "schema": {
                   "type": "array",
                   "items": {
-                    "type": "string"
+                    "$ref": "#/components/schemas/CreditorInstitutionInfo"
                   }
                 }
               }
@@ -2263,7 +2277,7 @@
       "CreditorInstitutionInfo": {
         "required": [
           "business_name",
-          "creditor_institution_code"
+          "ci_tax_code"
         ],
         "type": "object",
         "properties": {
@@ -2272,7 +2286,7 @@
             "description": "The business name of the creditor institution",
             "example": "Comune di Roma"
           },
-          "creditor_institution_code": {
+          "ci_tax_code": {
             "type": "string",
             "description": "The tax code of the creditor institution",
             "example": "02438750586"
@@ -2734,4 +2748,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/it/gov/pagopa/apiconfig/selfcareintegration/controller/CreditorInstitutionController.java b/src/main/java/it/gov/pagopa/apiconfig/selfcareintegration/controller/CreditorInstitutionController.java
index c4da62f..daae327 100644
--- a/src/main/java/it/gov/pagopa/apiconfig/selfcareintegration/controller/CreditorInstitutionController.java
+++ b/src/main/java/it/gov/pagopa/apiconfig/selfcareintegration/controller/CreditorInstitutionController.java
@@ -104,7 +104,7 @@ public ResponseEntity<StationDetailsList> getStationsDetailsFromCreditorInstitut
     @GetMapping(value = "/stations/{station-code}", produces = {MediaType.APPLICATION_JSON_VALUE})
     public ResponseEntity<List<CreditorInstitutionInfo>> getStationCreditorInstitutions(
             @Parameter(description = "Station's code") @PathVariable("station-code") String stationCode,
-            @Parameter(description = "List of Creditor Institution's tax code") @RequestParam @Size(max = 10) List<String> ciTaxCodeList
+            @Parameter(description = "List of Creditor Institution's tax code, restrict the research to this tax code list only") @RequestParam @Size(max = 10) List<String> ciTaxCodeList
     ) {
         return ResponseEntity.ok(this.creditorInstitutionsService.getStationCreditorInstitutions(stationCode, ciTaxCodeList));
     }