diff --git a/app/src/main/java/protect/card_locker/ScanActivity.java b/app/src/main/java/protect/card_locker/ScanActivity.java
index e9cee9f131..01fc3854dc 100644
--- a/app/src/main/java/protect/card_locker/ScanActivity.java
+++ b/app/src/main/java/protect/card_locker/ScanActivity.java
@@ -343,13 +343,21 @@ public void onTextChanged(CharSequence s, int start, int before, int count) {
     }
 
     public void addManually() {
-        Intent i = new Intent(getApplicationContext(), BarcodeSelectorActivity.class);
-        if (cardId != null) {
-            final Bundle b = new Bundle();
-            b.putString("initialCardId", cardId);
-            i.putExtras(b);
-        }
-        manualAddLauncher.launch(i);
+        MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(ScanActivity.this);
+        builder.setTitle(R.string.add_manually_warning_title);
+        builder.setMessage(R.string.add_manually_warning_message);
+        builder.setPositiveButton(R.string.continue_, (dialog, which) -> {
+            Intent i = new Intent(getApplicationContext(), BarcodeSelectorActivity.class);
+            if (cardId != null) {
+                final Bundle b = new Bundle();
+                b.putString("initialCardId", cardId);
+                i.putExtras(b);
+            }
+            manualAddLauncher.launch(i);
+        });
+        builder.setNegativeButton(R.string.cancel, (dialog, which) -> setScannerActive(true));
+        builder.setOnCancelListener(dialog -> setScannerActive(true));
+        builder.show();
     }
 
     public void addFromImage() {
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 66ecc3683e..fde49355d3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -335,4 +335,7 @@
     <string name="add_a_card_in_a_different_way">Add a card in a different way</string>
     <string name="field_must_not_be_empty">Field must not be empty</string>
     <string name="manually_enter_barcode_instructions">Enter the ID number or text on your card and press the barcode that looks like the one on your card.</string>
+    <string name="add_manually_warning_title">Scanning is recommended</string>
+    <string name="add_manually_warning_message">For some stores, the barcode value differs from the number written on the card. Because of this, entering a barcode manually may not always work. It is strongly recommended to scan the barcode with your camera instead. Do you still want to continue?</string>
+    <string name="continue_">Continue</string>
 </resources>