diff --git a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/dialogs/AddAccountDialog.kt b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/dialogs/AddAccountDialog.kt
index 49c0cd8f..adf4e3ed 100644
--- a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/dialogs/AddAccountDialog.kt
+++ b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/dialogs/AddAccountDialog.kt
@@ -183,6 +183,21 @@ open class AddAccountDialog : DialogFragment() {
         edtxtBankCode.clearListSelection()
 
         checkIfRequiredDataEnteredOnUiThread()
+
+        if (bank.supportsFinTs3_0 == false) {
+            showBankDoesNotSupportFinTs30ErrorMessage(bank)
+        }
+    }
+
+    private fun showBankDoesNotSupportFinTs30ErrorMessage(bank: BankInfo) {
+        activity?.let { context ->
+            val errorMessage = context.getString(R.string.dialog_add_account_bank_does_not_support_fints_3_error_message, bank.name)
+
+            AlertDialog.Builder(context)
+                .setMessage(errorMessage)
+                .setPositiveButton(android.R.string.ok) { dialog, _ -> dialog.dismiss() }
+                .show()
+        }
     }
 
     protected open fun checkIfRequiredDataEnteredOnUiThread() {
diff --git a/fints4javaAndroidApp/src/main/res/values/strings.xml b/fints4javaAndroidApp/src/main/res/values/strings.xml
index c31f468f..f14db977 100644
--- a/fints4javaAndroidApp/src/main/res/values/strings.xml
+++ b/fints4javaAndroidApp/src/main/res/values/strings.xml
@@ -29,6 +29,7 @@
     <string name="dialog_add_account_enter_customer_id">Customer Id:</string>
     <string name="dialog_add_account_enter_pin">Pin:</string>
     <string name="dialog_add_account_add">Add</string>
+    <string name="dialog_add_account_bank_does_not_support_fints_3_error_message">%s does not support FinTS 3.0 and therefore cannot be used in this application.</string>
     <string name="dialog_add_account_message_could_not_add_account">Could not add account: %s</string>
     <string name="dialog_add_account_message_successfully_added_account">
         Successfully added account.