diff --git a/custom/petition-cli.php b/custom/petition-cli.php
index f409ca5..1f50051 100755
--- a/custom/petition-cli.php
+++ b/custom/petition-cli.php
@@ -407,7 +407,9 @@ function showMenu(): void {
     echo "  3) Send e-post pa nytt til mislykkede\n";
     echo "  4) Send bekreftelse pa nytt til ubekreftede\n";
     echo "  5) Marker oppforinger som ignorert\n";
-    echo "  6) Avslutt\n";
+    echo "  6) Manuell bekreftelse av signaturer\n";
+    echo "  7) Slett signaturer\n";
+    echo "  8) Avslutt\n";
     echo "\n";
 }
 
@@ -642,6 +644,313 @@ function resendToUnconfirmed(): void {
     printColor("Ferdig: {$success} vellykket, {$failures} mislykket\n", $failures > 0 ? 'yellow' : 'green');
 }
 
+/**
+ * Atomically modify petition CSV file with a callback function.
+ * The callback receives the rows array (without header) by reference and can modify it.
+ * Returns the result from the callback, or null on file errors.
+ * 
+ * @param string $petitionId The petition ID
+ * @param callable $callback Function that receives (&$rows, $petitionId) and returns a result
+ * @return mixed|null The callback's return value, or null on error
+ */
+function modifyPetitionFile(string $petitionId, callable $callback): mixed {
+    $csvPath = PETITIONS_DIR . '/' . $petitionId . '.csv';
+    if (!file_exists($csvPath)) {
+        return null;
+    }
+    
+    // Open with r+ to allow reading and writing, acquire exclusive lock immediately
+    // This matches the pattern used in petition-form.php to prevent race conditions
+    $fp = fopen($csvPath, 'r+');
+    if (!$fp) {
+        printColor("  Advarsel: Kunne ikke apne {$petitionId}.csv\n", 'yellow');
+        return null;
+    }
+    
+    if (!flock($fp, LOCK_EX)) {
+        fclose($fp);
+        printColor("  Advarsel: Kunne ikke lase {$petitionId}.csv\n", 'yellow');
+        return null;
+    }
+    
+    // Read all rows while holding the lock
+    $header = fgetcsv($fp, null, ',', '"', '');
+    if ($header === false) {
+        flock($fp, LOCK_UN);
+        fclose($fp);
+        return null;
+    }
+    
+    $rows = [];
+    while (($row = fgetcsv($fp, null, ',', '"', '')) !== false) {
+        $rows[] = $row;
+    }
+    
+    // Call the callback to modify rows
+    $originalCount = count($rows);
+    $result = $callback($rows, $petitionId);
+    
+    // Write back if rows were modified (count changed or callback signals modification)
+    $modified = (count($rows) !== $originalCount);
+    if (!$modified && is_array($result) && isset($result['modified'])) {
+        $modified = $result['modified'];
+    }
+    
+    if ($modified) {
+        rewind($fp);
+        ftruncate($fp, 0);
+        fputcsv($fp, $header, ',', '"', '');
+        foreach ($rows as $row) {
+            fputcsv($fp, $row, ',', '"', '');
+        }
+    }
+    
+    flock($fp, LOCK_UN);
+    fclose($fp);
+    
+    return $result;
+}
+
+/**
+ * Manually confirm signatures by email address
+ */
+function manuallyConfirmSignatures(): void {
+    echo "\n";
+    printColor("Manuell bekreftelse av signaturer\n", 'cyan');
+    echo "\n";
+    
+    $input = prompt("Skriv inn e-postadresse(r) (kommaseparert): ");
+    if (empty(trim($input))) {
+        echo "Ingen e-postadresser oppgitt.\n";
+        return;
+    }
+    
+    // Parse and clean email addresses
+    $emails = array_map('trim', explode(',', $input));
+    $emails = array_filter($emails, fn($e) => !empty($e));
+    $emails = array_map('strtolower', $emails);
+    
+    if (empty($emails)) {
+        echo "Ingen gyldige e-postadresser oppgitt.\n";
+        return;
+    }
+    
+    echo "\n";
+    echo "Soker etter " . count($emails) . " e-postadresse(r)...\n\n";
+    
+    $found = [];
+    
+    // Search through all petition files
+    foreach (getPetitionFiles() as $petitionId) {
+        $result = modifyPetitionFile($petitionId, function(&$rows, $petitionId) use ($emails) {
+            $found = [];
+            $modified = false;
+            
+            foreach ($rows as &$row) {
+                if (!isset($row[1]) || !isset($row[6])) {
+                    continue;
+                }
+                
+                $rowEmail = strtolower($row[1]);
+                if (in_array($rowEmail, $emails)) {
+                    if ($row[6] === 'pending') {
+                        $row[6] = 'confirmed';
+                        $modified = true;
+                        $found[] = [
+                            'email' => $row[1],
+                            'name' => ($row[2] ?? '') . ' ' . ($row[3] ?? ''),
+                            'petition_id' => $petitionId,
+                            'was_pending' => true
+                        ];
+                    } else {
+                        $found[] = [
+                            'email' => $row[1],
+                            'name' => ($row[2] ?? '') . ' ' . ($row[3] ?? ''),
+                            'petition_id' => $petitionId,
+                            'was_pending' => false,
+                            'status' => $row[6]
+                        ];
+                    }
+                }
+            }
+            unset($row);
+            
+            return ['found' => $found, 'modified' => $modified];
+        });
+        
+        if ($result && !empty($result['found'])) {
+            $found = array_merge($found, $result['found']);
+        }
+    }
+    
+    // Determine which emails were not found
+    $foundEmails = array_map(fn($f) => strtolower($f['email']), $found);
+    $notFound = [];
+    foreach ($emails as $email) {
+        if (!in_array($email, $foundEmails)) {
+            $notFound[] = $email;
+        }
+    }
+    
+    // Display results
+    if (!empty($found)) {
+        printColor("Funnet:\n", 'green');
+        foreach ($found as $entry) {
+            $status = $entry['was_pending'] 
+                ? "BEKREFTET" 
+                : "allerede " . $entry['status'];
+            echo "  - {$entry['email']} ({$entry['name']}) - {$entry['petition_id']}: ";
+            if ($entry['was_pending']) {
+                printColor("{$status}\n", 'green');
+            } else {
+                printColor("{$status}\n", 'yellow');
+            }
+        }
+    }
+    
+    if (!empty($notFound)) {
+        echo "\n";
+        printColor("Ikke funnet:\n", 'red');
+        foreach ($notFound as $email) {
+            echo "  - {$email}\n";
+        }
+    }
+    
+    $confirmedCount = count(array_filter($found, fn($f) => $f['was_pending']));
+    echo "\n";
+    printColor("Ferdig: {$confirmedCount} signatur(er) bekreftet\n", 'green');
+}
+
+/**
+ * Manually delete signatures by email address
+ */
+function manuallyDeleteSignatures(): void {
+    echo "\n";
+    printColor("Slett signaturer\n", 'cyan');
+    echo "\n";
+    
+    $input = prompt("Skriv inn e-postadresse(r) (kommaseparert): ");
+    if (empty(trim($input))) {
+        echo "Ingen e-postadresser oppgitt.\n";
+        return;
+    }
+    
+    // Parse and clean email addresses
+    $emails = array_map('trim', explode(',', $input));
+    $emails = array_filter($emails, fn($e) => !empty($e));
+    $emails = array_map('strtolower', $emails);
+    
+    if (empty($emails)) {
+        echo "Ingen gyldige e-postadresser oppgitt.\n";
+        return;
+    }
+    
+    echo "\n";
+    echo "Soker etter " . count($emails) . " e-postadresse(r)...\n\n";
+    
+    $found = [];
+    
+    // First pass: find all matching signatures (read-only)
+    foreach (getPetitionFiles() as $petitionId) {
+        $csvPath = PETITIONS_DIR . '/' . $petitionId . '.csv';
+        if (!file_exists($csvPath)) {
+            continue;
+        }
+        
+        $fp = fopen($csvPath, 'r');
+        if (!$fp) {
+            continue;
+        }
+        
+        if (!flock($fp, LOCK_SH)) {
+            fclose($fp);
+            continue;
+        }
+        
+        fgetcsv($fp, null, ',', '"', ''); // Skip header
+        while (($row = fgetcsv($fp, null, ',', '"', '')) !== false) {
+            if (!isset($row[1])) {
+                continue;
+            }
+            
+            $rowEmail = strtolower($row[1]);
+            if (in_array($rowEmail, $emails)) {
+                $found[] = [
+                    'email' => $row[1],
+                    'name' => ($row[2] ?? '') . ' ' . ($row[3] ?? ''),
+                    'petition_id' => $petitionId,
+                    'status' => $row[6] ?? 'unknown',
+                    'timestamp' => (int)($row[0] ?? 0)
+                ];
+            }
+        }
+        
+        flock($fp, LOCK_UN);
+        fclose($fp);
+    }
+    
+    // Determine which emails were not found
+    $foundEmails = array_map(fn($f) => strtolower($f['email']), $found);
+    $notFound = [];
+    foreach ($emails as $email) {
+        if (!in_array($email, $foundEmails)) {
+            $notFound[] = $email;
+        }
+    }
+    
+    if (!empty($notFound)) {
+        printColor("Ikke funnet:\n", 'red');
+        foreach ($notFound as $email) {
+            echo "  - {$email}\n";
+        }
+        echo "\n";
+    }
+    
+    if (empty($found)) {
+        echo "Ingen signaturer a slette.\n";
+        return;
+    }
+    
+    // Show what will be deleted
+    printColor("Folgende signaturer vil bli slettet:\n", 'yellow');
+    foreach ($found as $entry) {
+        $date = formatDate($entry['timestamp']);
+        echo "  - {$entry['email']} ({$entry['name']}) - {$entry['petition_id']} [{$entry['status']}] {$date}\n";
+    }
+    
+    echo "\n";
+    if (!confirm("Er du sikker pa at du vil slette " . count($found) . " signatur(er)?")) {
+        echo "Avbrutt.\n";
+        return;
+    }
+    
+    // Second pass: delete the signatures
+    $deleted = 0;
+    $emailsToDelete = array_map(fn($f) => strtolower($f['email']), $found);
+    
+    foreach (getPetitionFiles() as $petitionId) {
+        $result = modifyPetitionFile($petitionId, function(&$rows, $petitionId) use ($emailsToDelete) {
+            $deletedCount = 0;
+            $rows = array_filter($rows, function($row) use ($emailsToDelete, &$deletedCount) {
+                if (isset($row[1]) && in_array(strtolower($row[1]), $emailsToDelete)) {
+                    $deletedCount++;
+                    return false; // Remove this row
+                }
+                return true; // Keep this row
+            });
+            $rows = array_values($rows); // Re-index
+            return ['deleted' => $deletedCount];
+        });
+        
+        if ($result && isset($result['deleted'])) {
+            $deleted += $result['deleted'];
+        }
+    }
+    
+    echo "\n";
+    printColor("Ferdig: {$deleted} signatur(er) slettet\n", 'green');
+}
+
 /**
  * Interactive ignore marking
  */
@@ -823,13 +1132,19 @@ function main(): void {
                 markAsIgnored();
                 break;
             case '6':
+                manuallyConfirmSignatures();
+                break;
+            case '7':
+                manuallyDeleteSignatures();
+                break;
+            case '8':
             case 'q':
             case 'quit':
             case 'exit':
                 echo "Ha det!\n";
                 exit(0);
             default:
-                printColor("Ugyldig valg. Velg 1-6.\n", 'red');
+                printColor("Ugyldig valg. Velg 1-8.\n", 'red');
         }
     }
 }