diff --git a/common/proto/tables_data.proto b/common/proto/tables_data.proto
index e38f047b..c18be2c9 100644
--- a/common/proto/tables_data.proto
+++ b/common/proto/tables_data.proto
@@ -185,6 +185,9 @@ message PostTableDataResponse {
 
   // Journal created or updated by automatic accounting, when applicable.
   optional int64 journal_id = 5;
+
+  // Non-blocking data-quality warnings produced while inserting the row.
+  repeated string warnings = 6;
 }
 
 message BeginTableDataImportRequest {
@@ -218,9 +221,17 @@ message CommitTableDataImportRequest {
   string import_id = 1;
 }
 
+message TableDataImportWarning {
+  // Zero-based position in the staged import, matching failed-row metadata.
+  int64 row_index = 1;
+  string table_name = 2;
+  string message = 3;
+}
+
 message CommitTableDataImportResponse {
   bool success = 1;
   int64 inserted_rows = 2;
+  repeated TableDataImportWarning warnings = 3;
 }
 
 message AbortTableDataImportRequest {
diff --git a/common/src/proto/descriptor.bin b/common/src/proto/descriptor.bin
index 95136937..c84d1209 100644
Binary files a/common/src/proto/descriptor.bin and b/common/src/proto/descriptor.bin differ
diff --git a/common/src/proto/komp_ac.tables_data.rs b/common/src/proto/komp_ac.tables_data.rs
index 70930ffd..bb3bafae 100644
--- a/common/src/proto/komp_ac.tables_data.rs
+++ b/common/src/proto/komp_ac.tables_data.rs
@@ -77,6 +77,9 @@ pub struct PostTableDataResponse {
     /// Journal created or updated by automatic accounting, when applicable.
     #[prost(int64, optional, tag = "5")]
     pub journal_id: ::core::option::Option<i64>,
+    /// Non-blocking data-quality warnings produced while inserting the row.
+    #[prost(string, repeated, tag = "6")]
+    pub warnings: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct BeginTableDataImportRequest {
@@ -122,12 +125,24 @@ pub struct CommitTableDataImportRequest {
     #[prost(string, tag = "1")]
     pub import_id: ::prost::alloc::string::String,
 }
-#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct TableDataImportWarning {
+    /// Zero-based position in the staged import, matching failed-row metadata.
+    #[prost(int64, tag = "1")]
+    pub row_index: i64,
+    #[prost(string, tag = "2")]
+    pub table_name: ::prost::alloc::string::String,
+    #[prost(string, tag = "3")]
+    pub message: ::prost::alloc::string::String,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CommitTableDataImportResponse {
     #[prost(bool, tag = "1")]
     pub success: bool,
     #[prost(int64, tag = "2")]
     pub inserted_rows: i64,
+    #[prost(message, repeated, tag = "3")]
+    pub warnings: ::prost::alloc::vec::Vec<TableDataImportWarning>,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct AbortTableDataImportRequest {
diff --git a/prod_data_parse_scripts/parse_uc_osnova.sh b/prod_data_parse_scripts/parse_uc_osnova.sh
index ccb65276..7bcdecbd 100644
--- a/prod_data_parse_scripts/parse_uc_osnova.sh
+++ b/prod_data_parse_scripts/parse_uc_osnova.sh
@@ -60,12 +60,17 @@ process_csv() {
         cleaned = clean_account($5)
         key = key_value(cleaned)
 
+        if (key == "") {
+            cleaned = "\"000\""
+            key = "000"
+        }
+
         $5 = cleaned
 
         # Deleted:
         # "000"  -> true
         # "000/" -> cleaned to "000" -> true
-        # ""     -> true
+        # ""     -> changed to "000" -> true
         #
         # Everything else -> false
         if (key == "000" || key == "") {
diff --git a/web/locales/cs/main.ftl b/web/locales/cs/main.ftl
index 47554207..8eb11fb6 100644
--- a/web/locales/cs/main.ftl
+++ b/web/locales/cs/main.ftl
@@ -616,6 +616,7 @@ import-success-message = Vloženo { $inserted ->
     [few] { $source_rows } připravených řádků
    *[other] { $source_rows } připravených řádků
 }.
+import-success-warnings = Upozornění: { $warnings }
 
 # --- Import v průběhu -------------------------------------------------------
 import-progress-heading = Importuje se do { $table }
diff --git a/web/locales/en/main.ftl b/web/locales/en/main.ftl
index b7f90f32..29294883 100644
--- a/web/locales/en/main.ftl
+++ b/web/locales/en/main.ftl
@@ -605,6 +605,7 @@ import-success-message = Inserted { $inserted ->
     [one] { $source_rows } prepared row
    *[other] { $source_rows } prepared rows
 }.
+import-success-warnings = Warnings: { $warnings }
 
 # --- The import while it runs ----------------------------------------------
 import-progress-heading = Importing into { $table }
diff --git a/web/locales/sk/main.ftl b/web/locales/sk/main.ftl
index eec10768..b2a3bbdd 100644
--- a/web/locales/sk/main.ftl
+++ b/web/locales/sk/main.ftl
@@ -614,6 +614,7 @@ import-success-message = Vložený { $inserted ->
     [one] { $source_rows } pripraveného riadka
    *[other] { $source_rows } pripravených riadkov
 }.
+import-success-warnings = Upozornenia: { $warnings }
 
 # --- Import počas behu ------------------------------------------------------
 import-progress-heading = Importuje sa do { $table }
diff --git a/web/src/pages/import_export/import/logic.rs b/web/src/pages/import_export/import/logic.rs
index e4cebcdc..8c2e2410 100644
--- a/web/src/pages/import_export/import/logic.rs
+++ b/web/src/pages/import_export/import/logic.rs
@@ -302,11 +302,12 @@ pub(crate) async fn import_progress(
 
     let response = match &snapshot.outcome {
         None => Html(ui::render_progress(locale, &id, &snapshot)).into_response(),
-        Some(Outcome::Succeeded) => Html(ui::render_success(
+        Some(Outcome::Succeeded { warnings }) => Html(ui::render_success(
             locale,
             snapshot.inserted,
             snapshot.total_rows,
             &snapshot.table_name,
+            warnings,
         ))
         .into_response(),
         Some(Outcome::RowFailed {
@@ -445,8 +446,21 @@ async fn run_import(job: Running) {
     };
     match committed {
         Ok(response) => {
-            let inserted = usize::try_from(response.into_inner().inserted_rows).unwrap_or(staged);
-            jobs.finish(&job.id, inserted, Outcome::Succeeded);
+            let response = response.into_inner();
+            let inserted = usize::try_from(response.inserted_rows).unwrap_or(staged);
+            let warnings = response
+                .warnings
+                .into_iter()
+                .map(|warning| {
+                    format!(
+                        "CSV row {} ({}): {}",
+                        warning.row_index + 2,
+                        warning.table_name,
+                        warning.message,
+                    )
+                })
+                .collect();
+            jobs.finish(&job.id, inserted, Outcome::Succeeded { warnings });
         }
         Err(error) => {
             abort_import(&job, &import_id).await;
diff --git a/web/src/pages/import_export/import/progress.rs b/web/src/pages/import_export/import/progress.rs
index e2bba2a7..67887a98 100644
--- a/web/src/pages/import_export/import/progress.rs
+++ b/web/src/pages/import_export/import/progress.rs
@@ -34,7 +34,7 @@ const KEEP_FINISHED: Duration = Duration::from_secs(300);
 #[derive(Clone, Debug)]
 pub(crate) enum Outcome {
     /// Every staged row was committed atomically.
-    Succeeded,
+    Succeeded { warnings: Vec<String> },
     /// The backend stopped on one row. No rows from the import were committed.
     RowFailed {
         status: StatusCode,
@@ -255,7 +255,7 @@ mod tests {
         assert!(jobs.is_running("session"));
         assert!(!jobs.is_running("other"));
 
-        jobs.finish(&id, 10, Outcome::Succeeded);
+        jobs.finish(&id, 10, Outcome::Succeeded { warnings: Vec::new() });
         assert!(!jobs.is_running("session"));
     }
 
@@ -267,7 +267,7 @@ mod tests {
             inserted: 0,
             total_rows: 0,
             elapsed: Duration::from_secs(1),
-            outcome: Some(Outcome::Succeeded),
+            outcome: Some(Outcome::Succeeded { warnings: Vec::new() }),
         };
 
         assert_eq!(snapshot.percent(), 100);
diff --git a/web/src/pages/import_export/import/ui.rs b/web/src/pages/import_export/import/ui.rs
index a925ae90..e39178db 100644
--- a/web/src/pages/import_export/import/ui.rs
+++ b/web/src/pages/import_export/import/ui.rs
@@ -169,17 +169,27 @@ pub(crate) fn render_success(
     inserted: usize,
     prepared_rows: usize,
     table_name: &str,
+    warnings: &[String],
 ) -> String {
+    let mut message = tr!(
+        locale,
+        "import-success-message",
+        "inserted" => inserted as i64,
+        "source_rows" => prepared_rows as i64,
+        "table" => table_name.to_string(),
+    );
+    if !warnings.is_empty() {
+        message.push(' ');
+        message.push_str(&tr!(
+            locale,
+            "import-success-warnings",
+            "warnings" => warnings.join("; "),
+        ));
+    }
     render(&ImportSuccessDialog {
         locale,
         title: &tr!(locale, "import-success-title"),
-        message: &tr!(
-            locale,
-            "import-success-message",
-            "inserted" => inserted as i64,
-            "source_rows" => prepared_rows as i64,
-            "table" => table_name.to_string(),
-        ),
+        message: &message,
     })
 }
 
@@ -485,7 +495,7 @@ mod tests {
     /// dialog the user has to actively dismiss, not a toast on its own timer.
     #[test]
     fn a_finished_import_answers_with_a_dismissible_dialog_not_a_toast() {
-        let html = render_success(Locale::English, 500, 500, "customers");
+        let html = render_success(Locale::English, 500, 500, "customers", &[]);
 
         assert!(!html.contains("Template error"), "{html}");
         assert!(html.contains(r#"role="dialog""#), "{html}");
@@ -497,4 +507,19 @@ mod tests {
         assert!(!html.contains("$dispatch('notify'"), "{html}");
         assert!(html.contains("keydown.esc"), "{html}");
     }
+
+    #[test]
+    fn a_finished_import_displays_non_blocking_warnings() {
+        let html = render_success(
+            Locale::English,
+            1,
+            1,
+            "customers",
+            &["CSV row 2 (customers): Deleted row omitted required column 'name'".to_string()],
+        );
+
+        assert!(html.contains("Warnings:"), "{html}");
+        assert!(html.contains("CSV row 2"), "{html}");
+        assert!(html.contains("Deleted row omitted required column"), "{html}");
+    }
 }