diff --git a/bin/v-delete-user-favourites b/bin/v-delete-user-favourites
index 374fa430..28a8dd97 100755
--- a/bin/v-delete-user-favourites
+++ b/bin/v-delete-user-favourites
@@ -32,6 +32,8 @@ case $system in
     DNS_REC)    is_format_valid 'id' ;;
     *)          is_format_valid 'object'
 esac
+
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"
 is_object_unsuspended 'user' 'USER' "$user"
 
diff --git a/bin/v-list-dns-domain b/bin/v-list-dns-domain
index f72943f9..c9c3f1ea 100755
--- a/bin/v-list-dns-domain
+++ b/bin/v-list-dns-domain
@@ -71,6 +71,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '2' "$#" 'USER DOMAIN [FORMAT]'
+is_format_valid 'user' 'domain'
 is_object_valid 'user' 'USER' "$user"
 is_object_valid 'dns' 'DOMAIN' "$domain"
 
diff --git a/bin/v-list-letsencrypt-user b/bin/v-list-letsencrypt-user
index 6289ecba..f6e2c774 100755
--- a/bin/v-list-letsencrypt-user
+++ b/bin/v-list-letsencrypt-user
@@ -56,6 +56,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '1' "$#" 'USER [FORMAT]'
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"
 if [ ! -e "$USER_DATA/ssl/le.conf" ]; then
     check_result $E_NOTEXIST "LetsEncrypt user account doesn't exist"
diff --git a/bin/v-list-mail-domain-dkim-dns b/bin/v-list-mail-domain-dkim-dns
index 8623089e..d9f9d5ba 100755
--- a/bin/v-list-mail-domain-dkim-dns
+++ b/bin/v-list-mail-domain-dkim-dns
@@ -57,6 +57,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '2' "$#" 'USER DOMAIN [FORMAT]'
+is_format_valid 'user' 'domain'
 is_object_valid 'user' 'USER' "$user"
 is_object_valid 'mail' 'DOMAIN' "$domain"
 
diff --git a/bin/v-list-user b/bin/v-list-user
index 05649f91..57b48bb3 100755
--- a/bin/v-list-user
+++ b/bin/v-list-user
@@ -154,6 +154,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '1' "$#" 'USER [FORMAT]'
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"
 
 
diff --git a/bin/v-list-user-backup b/bin/v-list-user-backup
index 2e0a98d0..8ee8a41b 100755
--- a/bin/v-list-user-backup
+++ b/bin/v-list-user-backup
@@ -75,6 +75,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '2' "$#" 'USER BACKUP [FORMAT]'
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"
 is_object_valid 'backup' 'BACKUP' "$backup"
 
diff --git a/bin/v-list-user-stats b/bin/v-list-user-stats
index 11b867af..0fa7dc90 100755
--- a/bin/v-list-user-stats
+++ b/bin/v-list-user-stats
@@ -115,6 +115,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '1' "$#" 'USER [FORMAT]'
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"
 
 
diff --git a/bin/v-list-web-domain b/bin/v-list-web-domain
index e0f9492c..7e33a4ab 100755
--- a/bin/v-list-web-domain
+++ b/bin/v-list-web-domain
@@ -110,6 +110,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '2' "$#" 'USER DOMAIN [FORMAT]'
+is_format_valid 'user' 'domain'
 is_object_valid 'user' 'USER' "$user"
 is_object_valid 'web' 'DOMAIN' "$domain"
 
diff --git a/bin/v-list-web-domain-ssl b/bin/v-list-web-domain-ssl
index 99fd5cf8..d637cf89 100755
--- a/bin/v-list-web-domain-ssl
+++ b/bin/v-list-web-domain-ssl
@@ -98,6 +98,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '2' "$#" 'USER DOMAIN [FORMAT]'
+is_format_valid 'user' 'domain'
 is_object_valid 'user' 'USER' "$user"
 is_object_valid 'web' 'DOMAIN' "$domain"
 
diff --git a/bin/v-list-web-domains b/bin/v-list-web-domains
index a31199fa..23de5fb4 100755
--- a/bin/v-list-web-domains
+++ b/bin/v-list-web-domains
@@ -100,6 +100,7 @@ csv_list() {
 #----------------------------------------------------------#
 
 check_args '1' "$#" 'USER [FORMAT]'
+is_format_valid 'user'
 is_object_valid 'user' 'USER' "$user"