diff --git a/src/idz/decoder.ts b/src/idz/decoder.ts
index 9dc1649..5c8bdd8 100644
--- a/src/idz/decoder.ts
+++ b/src/idz/decoder.ts
@@ -77,6 +77,13 @@ readers.set(MSG.GET_CONFIG_DATA_2_REQ, () => {
   return { type: "get_config_2_req" };
 });
 
+readers.set(MSG.GET_EXIST_RECORD_REQ, buf => {
+  return {
+    type: "get_exist_record_req",
+    aimeId: buf.readUInt32LE(0x0004),
+  };
+});
+
 readers.set(MSG.GET_SERVER_LIST_REQ, () => {
   return { type: "get_server_list_req" };
 });
diff --git a/src/idz/defs.ts b/src/idz/defs.ts
index 12ada30..e86c116 100644
--- a/src/idz/defs.ts
+++ b/src/idz/defs.ts
@@ -8,6 +8,8 @@ export const MSG = {
   UPDATE_RECORD_REQ: 0x0068,
   ACCOUNT_LOCK_REQ: 0x0069,
   ACCOUNT_LOCK_RES: 0x006a,
+  GET_EXIST_RECORD_REQ: 0x006b,
+  GET_EXIST_RECORD_RES: 0x006c,
   ACCOUNT_UNLOCK_REQ: 0x006f,
   ACCOUNT_UNLOCK_RES: 0x0070,
   CREATE_TEAM_REQ: 0x007b,
@@ -27,6 +29,7 @@ REQ_LEN.set(MSG.CREATE_RECORD_REQ, 0x00c0);
 REQ_LEN.set(MSG.CREATE_TEAM_REQ, 0x0010);
 REQ_LEN.set(MSG.GET_CONFIG_REQ, 0x0050);
 REQ_LEN.set(MSG.GET_CONFIG_DATA_2_REQ, 0x0010);
+REQ_LEN.set(MSG.GET_EXIST_RECORD_REQ, 0x0010);
 REQ_LEN.set(MSG.GET_SERVER_LIST_REQ, 0x0020);
 REQ_LEN.set(MSG.UPDATE_PROVISIONAL_STORE_RANK_REQ, 0x0010);
 REQ_LEN.set(MSG.UPDATE_RECORD_REQ, 0x0940);
diff --git a/src/idz/encoder.ts b/src/idz/encoder.ts
index 277fb3a..4c3f740 100644
--- a/src/idz/encoder.ts
+++ b/src/idz/encoder.ts
@@ -64,6 +64,13 @@ export class Encoder extends Transform {
 
         break;
 
+      case "get_exist_record_res":
+        buf = Buffer.alloc(0x0010);
+        buf.writeUInt16LE(MSG.GET_EXIST_RECORD_RES, 0x0000);
+        buf.writeUInt8(obj.result ? 1 : 0, 0x0004);
+
+        break;
+
       case "get_server_list_res":
         buf = Buffer.alloc(0x04b0);
         buf.writeUInt16LE(MSG.GET_SERVER_LIST_RES, 0x0000);
@@ -111,6 +118,8 @@ export class Encoder extends Transform {
         break;
 
       default:
+        const exhaustCheck: never = obj;
+
         return callback(new Error(`No writer fn for ${obj["type"]}`));
     }
 
diff --git a/src/idz/index.ts b/src/idz/index.ts
index fe9a21c..9b55552 100644
--- a/src/idz/index.ts
+++ b/src/idz/index.ts
@@ -46,6 +46,22 @@ export default async function idz(socket: Socket) {
 
           break;
 
+        case "get_config_req":
+          output.write({
+            type: "get_config_res",
+            status: 1,
+          });
+
+          break;
+
+        case "get_config_2_req":
+          output.write({
+            type: "get_config_2_res",
+            status: 1,
+          });
+
+          break;
+
         case "get_server_list_req":
           const myHost = hostname();
 
@@ -91,18 +107,10 @@ export default async function idz(socket: Socket) {
 
           break;
 
-        case "get_config_req":
+        case "get_exist_record_req":
           output.write({
-            type: "get_config_res",
-            status: 1,
-          });
-
-          break;
-
-        case "get_config_2_req":
-          output.write({
-            type: "get_config_2_res",
-            status: 1,
+            type: "get_exist_record_res",
+            result: false,
           });
 
           break;
diff --git a/src/idz/request.ts b/src/idz/request.ts
index 54b309d..738b50d 100644
--- a/src/idz/request.ts
+++ b/src/idz/request.ts
@@ -52,6 +52,11 @@ export interface GetConfigRequest2 {
   type: "get_config_2_req";
 }
 
+export interface GetExistRecordRequest {
+  type: "get_exist_record_req";
+  aimeId: number;
+}
+
 export interface GetServerListRequest {
   type: "get_server_list_req";
 }
@@ -73,6 +78,7 @@ export type Request =
   | CreateTeamRequest
   | GetConfigRequest
   | GetConfigRequest2
+  | GetExistRecordRequest
   | GetServerListRequest
   | UpdateProvisionalStoreRankRequest
   | UpdateRecordRequest;
diff --git a/src/idz/response.ts b/src/idz/response.ts
index cd3c759..8c663cd 100644
--- a/src/idz/response.ts
+++ b/src/idz/response.ts
@@ -30,6 +30,11 @@ export interface GetConfigResponse2 {
   status: number;
 }
 
+export interface GetExistRecordResponse {
+  type: "get_exist_record_res";
+  result: boolean;
+}
+
 export interface GetServerListResponse {
   type: "get_server_list_res";
   status: number;
@@ -89,5 +94,6 @@ export type Response =
   | GenericResponse
   | GetConfigResponse
   | GetConfigResponse2
+  | GetExistRecordResponse
   | GetServerListResponse
   | UpdateProvisionalStoreRankResponse;