diff --git a/src/NodaUncertaintyHelper.php b/src/NodaUncertaintyHelper.php
index aa0d2c8..4ded99d 100644
--- a/src/NodaUncertaintyHelper.php
+++ b/src/NodaUncertaintyHelper.php
@@ -116,6 +116,8 @@ final class NodaUncertaintyHelper {
      */
     public static function cleanUncertaintyIndicatorsPlace(string $ort_name):string {
 
+        $ort_name = \trim($ort_name);
+
         // Remove uncertainty prefixes
         foreach (NodaUncertaintyHelper::PLACE_UNCERTAINTY_PREFIXES as $prefix) {
             if (\substr($ort_name, 0, \strlen($prefix)) === "$prefix") {
@@ -172,6 +174,8 @@ final class NodaUncertaintyHelper {
      */
     public static function cleanUncertaintyIndicatorsPersinst(string $value):string {
 
+        $value = \trim($value);
+
         foreach (self::PERSINST_UNCERTAINTY_PREFIXES as $toRemove) {
             if (\mb_substr($value, 0, \mb_strlen($toRemove)) === $toRemove) {
                 $value = substr($value, \mb_strlen($toRemove));