diff --git a/scenes/seader_scene_card_menu.c b/scenes/seader_scene_card_menu.c
index dca9dc0..e6364ec 100644
--- a/scenes/seader_scene_card_menu.c
+++ b/scenes/seader_scene_card_menu.c
@@ -34,7 +34,7 @@ void seader_scene_card_menu_on_enter(void* context) {
         seader_scene_card_menu_submenu_callback,
         seader);
     if(seader->is_debug_enabled) {
-        if(credential->sio[0] != 0) {
+        if(credential->sio[0] == 0x30) {
             submenu_add_item(
                 submenu,
                 "Save SR",
diff --git a/scenes/seader_scene_credential_info.c b/scenes/seader_scene_credential_info.c
index 9b8e69a..d8cb084 100644
--- a/scenes/seader_scene_credential_info.c
+++ b/scenes/seader_scene_credential_info.c
@@ -72,7 +72,7 @@ void seader_scene_credential_info_on_enter(void* context) {
         FontSecondary,
         furi_string_get_cstr(credential_str));
 
-    if(credential->sio[0] != 0) {
+    if(credential->sio[0] == 0x30) {
         furi_string_set(sio_str, "+SIO");
         widget_add_string_element(
             widget, 64, 48, AlignCenter, AlignCenter, FontSecondary, furi_string_get_cstr(sio_str));
diff --git a/seader_worker.c b/seader_worker.c
index 33dbd38..d537ffd 100644
--- a/seader_worker.c
+++ b/seader_worker.c
@@ -378,10 +378,13 @@ bool unpack_pacs(
             FURI_LOG_D(TAG, "Received pac: %s", pacDebug);
 
             memset(display, 0, sizeof(display));
-            for(uint8_t i = 0; i < sizeof(seader_credential->sio); i++) {
-                snprintf(display + (i * 2), sizeof(display), "%02x", seader_credential->sio[i]);
+            if(seader_credential->sio[0] == 0x30) {
+                for(uint8_t i = 0; i < sizeof(seader_credential->sio); i++) {
+                    snprintf(
+                        display + (i * 2), sizeof(display), "%02x", seader_credential->sio[i]);
+                }
+                FURI_LOG_D(TAG, "SIO %s", display);
             }
-            FURI_LOG_D(TAG, "SIO %s", display);
         }
 
         if(pac->size <= sizeof(seader_credential->credential)) {
@@ -565,7 +568,7 @@ bool iso15693Transmit(SeaderWorker* seader_worker, uint8_t* buffer, size_t len)
             snprintf(display + (i * 2), sizeof(display), "%02x", rxBuffer[i]);
         }
         // FURI_LOG_D(TAG, "Result %d %s", recvLen, display);
-        if(memcmp(buffer, readBlock6, len) == 0) {
+        if(memcmp(buffer, readBlock6, len) == 0 && rxBuffer[0] == 0x30) {
             memcpy(credential->sio, rxBuffer, 32);
         } else if(memcmp(buffer, readBlock9, len) == 0) {
             memcpy(credential->sio + 32, rxBuffer + 8, 24);