diff --git a/clearing-parent/swt-exporter/src/main/java/ru/spcex/clearing/swt/exporter/services/exportimpl/DF12Exporter.java b/clearing-parent/swt-exporter/src/main/java/ru/spcex/clearing/swt/exporter/services/exportimpl/DF12Exporter.java
index 57b49a4ec..040452d60 100644
--- a/clearing-parent/swt-exporter/src/main/java/ru/spcex/clearing/swt/exporter/services/exportimpl/DF12Exporter.java
+++ b/clearing-parent/swt-exporter/src/main/java/ru/spcex/clearing/swt/exporter/services/exportimpl/DF12Exporter.java
@@ -58,8 +58,10 @@ public class DF12Exporter extends AbstractExporterService<SDf12> {
     @Override
     protected String convertRecord(SDf12 record, ConvertionContext context) {
         StringBuilder stringBuilder = new StringBuilder();
-        if (!Objects.equals(lastHeader20, record.getOutDocument())) { // header
-            stringBuilder.append(":20:").append(record.getOutDocument()).append(SWTHeaderData.LINE_SEPARATOR);
+        if (!Objects.equals(lastHeader20, record.getOutDocument())) { // header, тег :20: должен быть 1 раз только в начале документа
+            //stringBuilder.append(":20:").append(record.getOutDocument()).append(SWTHeaderData.LINE_SEPARATOR);
+            log.debug("SWT generationId={} last header :20: was \"{}\" but next record OutDocument=\"{}\"",
+                    record.getGenerationId(), lastHeader20, record.getOutDocument());
             lastHeader20 = record.getOutDocument();
         }
         stringBuilder.append(":23:").append(record.getDirection()).append(SWTHeaderData.LINE_SEPARATOR);
@@ -81,9 +83,9 @@ public class DF12Exporter extends AbstractExporterService<SDf12> {
         swtHeaderData.setType(typeForHeader());
         swtHeaderData.setDateTime(LocalDateTime.now());
         if (record != null) {
-//            swtHeaderData.setValFor20Tag(record.getOutDocument());
+            swtHeaderData.setValFor20Tag(record.getOutDocument());
+            lastHeader20 = null;
         }
-        lastHeader20 = null;
         return swtHeaderData;
     }