diff --git a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/blockification/BlockificationPostprocessingService.java b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/blockification/BlockificationPostprocessingService.java
index 640b68f..388e18e 100644
--- a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/blockification/BlockificationPostprocessingService.java
+++ b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/blockification/BlockificationPostprocessingService.java
@@ -273,6 +273,10 @@ public class BlockificationPostprocessingService {
         List<TextPositionSequence> postSequence = new ArrayList<>();
         StringBuilder currentSequence = new StringBuilder();
 
+        if (target.isBlank()){
+            return new WordSequenceResult();
+        }
+
         for (TextPositionSequence sequence : textPositionSequences) {
 
             currentSequence.append(sanitizeString(sequence.toString()));