diff --git a/config_template.json b/config_template.json
index 4aca86f..8c0ecff 100644
--- a/config_template.json
+++ b/config_template.json
@@ -1,6 +1,7 @@
 {
     "maingate_mongodb_url": "mongodb://...",
     "autologin_ttl": 604800,
+    "acc_del_ttl": 7776000,
     "maximum_num_link_account": 10,    
     "redirect_base_url": "",
     "google_client_id" : "",
diff --git a/core/maingate.go b/core/maingate.go
index d168a6a..7d61003 100644
--- a/core/maingate.go
+++ b/core/maingate.go
@@ -124,6 +124,7 @@ type maingateConfig struct {
 	Mongo                          string `json:"maingate_mongodb_url"`
 	SessionTTL                     int64  `json:"maingate_session_ttl"`
 	Autologin_ttl                  int64  `json:"autologin_ttl"`
+	AccDelTTL                      int64  `json:"acc_del_ttl"`
 	MaximumNumLinkAccount          int64  `json:"maximum_num_link_account"`
 	RedirectBaseUrl                string `json:"redirect_base_url"`
 	GoogleClientId                 string `json:"google_client_id"`
@@ -354,6 +355,14 @@ func (mg *Maingate) prepare(context context.Context) (err error) {
 		return makeErrorWithStack(err)
 	}
 
+	if err = mg.mongoClient.MakeExpireIndex(CollectionAccount, int32(mg.AccDelTTL)); err != nil {
+		return makeErrorWithStack(err)
+	}
+
+	if err = mg.mongoClient.MakeExpireIndex(CollectionLink, int32(mg.AccDelTTL)); err != nil {
+		return makeErrorWithStack(err)
+	}
+
 	// Delete대신 _ts로 expire시킴. pipeline에 삭제 알려주기 위함
 	if err = mg.mongoClient.MakeExpireIndex(CollectionWhitelist, 10); err != nil {
 		return makeErrorWithStack(err)
diff --git a/core/service.go b/core/service.go
index 0058d0b..fc9df45 100644
--- a/core/service.go
+++ b/core/service.go
@@ -673,6 +673,7 @@ func (sh *serviceDescription) authorize(w http.ResponseWriter, r *http.Request)
 		link, err := sh.mongoClient.FindOneAndUpdate(CollectionLink, bson.M{
 			"platform": authtype,
 			"uid":      uid,
+			"_ts":      bson.M{"$exists": false},
 		}, bson.M{
 			"$setOnInsert": bson.M{
 				"create": createtime,
@@ -850,27 +851,33 @@ func (sh *serviceDescription) delacc(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	var addIdFilter bson.A
+	var addIdFilter primitive.A
 	for _, accid := range accids {
 		addIdFilter = append(addIdFilter, accid["_id"].(primitive.ObjectID))
 	}
 
-	delfilter := bson.D{{Key: "_id", Value: bson.D{{Key: "$in", Value: addIdFilter}}}}
-	delaccnum, err := sh.mongoClient.DeleteMany(CollectionAccount, delfilter)
-	if err != nil {
-		logger.Error("delacc failed. Delete many CollectionAccount err :", err)
+	delfilter := primitive.M{"_id": bson.M{"$in": addIdFilter}}
+	curtime := primitive.NewDateTimeFromTime(time.Now().UTC())
+	updated, _, err := sh.mongoClient.Update(CollectionAccount, delfilter, bson.M{
+		"$set": bson.M{"_ts": curtime},
+	}, options.Update().SetUpsert(false))
+
+	if !updated || err != nil {
+		logger.Error("delacc failed. Update CollectionAccount timestamp err :", err)
 		w.WriteHeader(http.StatusInternalServerError)
 		return
 	}
 
-	_, err = sh.mongoClient.DeleteMany(CollectionLink, delfilter)
-	if err != nil {
-		logger.Error("delacc failed. Delete many CollectionLink err :", err)
+	updated, _, err = sh.mongoClient.Update(CollectionLink, delfilter, bson.M{
+		"$set": bson.M{"_ts": curtime},
+	}, options.Update().SetUpsert(false))
+	if !updated || err != nil {
+		logger.Error("delacc failed. Update CollectionLink timestamp err :", err)
 		w.WriteHeader(http.StatusInternalServerError)
 		return
 	}
 
-	logger.Println("delacc success :", delaccnum)
+	logger.Println("delacc success :", accids)
 }
 
 func (sh *serviceDescription) serveHTTP(w http.ResponseWriter, r *http.Request) {