diff --git a/Pdf4QtDiff/mainwindow.cpp b/Pdf4QtDiff/mainwindow.cpp
index a959dc7..ed88f23 100644
--- a/Pdf4QtDiff/mainwindow.cpp
+++ b/Pdf4QtDiff/mainwindow.cpp
@@ -666,11 +666,11 @@ void MainWindow::setViewDocument(pdf::PDFDocument* document, bool updateCustomPa
         if (document)
         {
             pdf::PDFModifiedDocument modifiedDocument(document, m_optionalContentActivity);
-            m_pdfWidget->setDocument(modifiedDocument);
+            m_pdfWidget->setDocument(modifiedDocument, {});
         }
         else
         {
-            m_pdfWidget->setDocument(pdf::PDFModifiedDocument());
+            m_pdfWidget->setDocument(pdf::PDFModifiedDocument(), {});
         }
     }
 
diff --git a/Pdf4QtLibCore/sources/pdfannotation.cpp b/Pdf4QtLibCore/sources/pdfannotation.cpp
index 6ca20f9..db3b507 100644
--- a/Pdf4QtLibCore/sources/pdfannotation.cpp
+++ b/Pdf4QtLibCore/sources/pdfannotation.cpp
@@ -24,7 +24,6 @@
 #include "pdfparser.h"
 #include "pdfform.h"
 #include "pdfpainterutils.h"
-#include "pdfdocumentbuilder.h"
 
 #include <QtMath>
 #include <QIcon>
diff --git a/Pdf4QtLibGui/pdfprogramcontroller.cpp b/Pdf4QtLibGui/pdfprogramcontroller.cpp
index ec75f95..0d1cdb2 100644
--- a/Pdf4QtLibGui/pdfprogramcontroller.cpp
+++ b/Pdf4QtLibGui/pdfprogramcontroller.cpp
@@ -1744,7 +1744,7 @@ void PDFProgramController::onFileChanged(const QString& fileName)
         QByteArray hash = pdf::PDFDocumentReader::hash(data);
         if (m_pdfDocument && m_pdfDocument->getSourceDataHash() != hash)
         {
-            auto queryPassword = [this](bool* ok)
+            auto queryPassword = [](bool* ok)
             {
                 *ok = false;
                 return QString();
@@ -1879,7 +1879,7 @@ void PDFProgramController::onDocumentReadingFinished()
             m_pdfDocument = qMove(result.document);
             m_signatures = qMove(result.signatures);
             pdf::PDFModifiedDocument document(m_pdfDocument.data(), m_optionalContentActivity);
-            setDocument(document, true);
+            setDocument(document, m_signatures, true);
 
             if (m_formManager)
             {
@@ -1951,17 +1951,17 @@ void PDFProgramController::onDocumentModified(pdf::PDFModifiedDocument document)
 
     m_pdfDocument = document;
     document.setOptionalContentActivity(m_optionalContentActivity);
-    setDocument(document, false);
+    setDocument(document, {}, false);
 }
 
 void PDFProgramController::onDocumentUndoRedo(pdf::PDFModifiedDocument document)
 {
     m_pdfDocument = document;
     document.setOptionalContentActivity(m_optionalContentActivity);
-    setDocument(document, false);
+    setDocument(document, {}, false);
 }
 
-void PDFProgramController::setDocument(pdf::PDFModifiedDocument document, bool isCurrentSaved)
+void PDFProgramController::setDocument(pdf::PDFModifiedDocument document, std::vector<pdf::PDFSignatureVerificationResult> signatureVerificationResult, bool isCurrentSaved)
 {
     if (document.hasReset())
     {
@@ -2021,7 +2021,7 @@ void PDFProgramController::setDocument(pdf::PDFModifiedDocument document, bool i
         m_undoRedoManager->setIsCurrentSaved(isCurrentSaved);
     }
 
-    m_pdfWidget->setDocument(document);
+    m_pdfWidget->setDocument(document, std::move(signatureVerificationResult));
     m_mainWindowInterface->setDocument(document);
     m_CMSManager->setDocument(document);
 
@@ -2065,7 +2065,7 @@ void PDFProgramController::closeDocument()
     }
 
     m_signatures.clear();
-    setDocument(pdf::PDFModifiedDocument(), true);
+    setDocument(pdf::PDFModifiedDocument(), {}, true);
     m_pdfDocument.reset();
     updateActionsAvailability();
     updateTitle();
diff --git a/Pdf4QtLibGui/pdfprogramcontroller.h b/Pdf4QtLibGui/pdfprogramcontroller.h
index d88ca6d..6a46c11 100644
--- a/Pdf4QtLibGui/pdfprogramcontroller.h
+++ b/Pdf4QtLibGui/pdfprogramcontroller.h
@@ -275,7 +275,7 @@ public:
     Q_DECLARE_FLAGS(Features, Feature)
 
     void openDocument(const QString& fileName);
-    void setDocument(pdf::PDFModifiedDocument document, bool isCurrentSaved);
+    void setDocument(pdf::PDFModifiedDocument document, std::vector<pdf::PDFSignatureVerificationResult> signatureVerificationResult, bool isCurrentSaved);
     void closeDocument();
 
     pdf::PDFWidget* getPdfWidget() const { return m_pdfWidget; }
diff --git a/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.cpp b/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.cpp
index 658469b..8c5456a 100644
--- a/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.cpp
+++ b/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.cpp
@@ -487,7 +487,7 @@ PDFDrawWidgetProxy::~PDFDrawWidgetProxy()
 
 }
 
-void PDFDrawWidgetProxy::setDocument(const PDFModifiedDocument& document)
+void PDFDrawWidgetProxy::setDocument(const PDFModifiedDocument& document, std::vector<PDFSignatureVerificationResult> signatureVerificationResult)
 {
     if (getDocument() != document)
     {
@@ -509,6 +509,8 @@ void PDFDrawWidgetProxy::setDocument(const PDFModifiedDocument& document)
             m_cacheClearTimer->start(CACHE_CLEAR_TIMEOUT);
         }
     }
+
+    m_signatureVerificationResult = std::move(signatureVerificationResult);
 }
 
 void PDFDrawWidgetProxy::init(PDFWidget* widget)
diff --git a/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.h b/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.h
index 8b9ffb3..bf245e0 100644
--- a/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.h
+++ b/Pdf4QtLibWidgets/sources/pdfdrawspacecontroller.h
@@ -18,6 +18,7 @@
 #ifndef PDFDRAWSPACECONTROLLER_H
 #define PDFDRAWSPACECONTROLLER_H
 
+#include "pdfsignaturehandler.h"
 #include "pdfwidgetsglobal.h"
 #include "pdfglobal.h"
 #include "pdfdocument.h"
@@ -190,7 +191,7 @@ public:
     /// in that case, draw space is cleared. Optional content activity can be nullptr,
     /// in that case, no content is suppressed.
     /// \param document Document
-    void setDocument(const PDFModifiedDocument& document);
+    void setDocument(const PDFModifiedDocument& document, std::vector<PDFSignatureVerificationResult> signatureVerificationResult);
 
     void init(PDFWidget* widget);
 
@@ -374,6 +375,7 @@ public:
     void setGroupTransparency(PDFInteger groupIndex, bool drawPaper = true, PDFReal transparency = 1.0);
     
     PDFWidgetAnnotationManager* getAnnotationManager() const;
+    const std::vector<PDFSignatureVerificationResult>& getSignatureVerificationResult() const { return m_signatureVerificationResult; }
 
 signals:
     void drawSpaceChanged();
@@ -540,6 +542,9 @@ private:
     /// can be rendered with transparency or without paper
     /// as overlay.
     std::map<PDFInteger, GroupInfo> m_groupInfos;
+
+    /// Signature verification results
+    std::vector<PDFSignatureVerificationResult> m_signatureVerificationResult;
 };
 
 }   // namespace pdf
diff --git a/Pdf4QtLibWidgets/sources/pdfdrawwidget.cpp b/Pdf4QtLibWidgets/sources/pdfdrawwidget.cpp
index 871a61d..5d41519 100644
--- a/Pdf4QtLibWidgets/sources/pdfdrawwidget.cpp
+++ b/Pdf4QtLibWidgets/sources/pdfdrawwidget.cpp
@@ -86,9 +86,9 @@ bool PDFWidget::focusNextPrevChild(bool next)
     return QWidget::focusNextPrevChild(next);
 }
 
-void PDFWidget::setDocument(const PDFModifiedDocument& document)
+void PDFWidget::setDocument(const PDFModifiedDocument& document, std::vector<PDFSignatureVerificationResult> signatureVerificationResult)
 {
-    m_proxy->setDocument(document);
+    m_proxy->setDocument(document, std::move(signatureVerificationResult));
     m_pageRenderingErrors.clear();
     m_drawWidget->getWidget()->update();
 }
diff --git a/Pdf4QtLibWidgets/sources/pdfdrawwidget.h b/Pdf4QtLibWidgets/sources/pdfdrawwidget.h
index d27eacb..c10ae0a 100644
--- a/Pdf4QtLibWidgets/sources/pdfdrawwidget.h
+++ b/Pdf4QtLibWidgets/sources/pdfdrawwidget.h
@@ -18,6 +18,7 @@
 #ifndef PDFDRAWWIDGET_H
 #define PDFDRAWWIDGET_H
 
+#include "pdfsignaturehandler.h"
 #include "pdfwidgetsglobal.h"
 #include "pdfglobal.h"
 #include "pdfrenderer.h"
@@ -73,7 +74,7 @@ public:
     /// in that case, widget contents are cleared. Optional content activity can be nullptr,
     /// if this occurs, no content is suppressed.
     /// \param document Document
-    void setDocument(const PDFModifiedDocument& document);
+    void setDocument(const PDFModifiedDocument& document, std::vector<PDFSignatureVerificationResult> signatureVerificationResult);
 
     /// Update rendering engine according the settings
     /// \param engine Engine type
diff --git a/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.cpp b/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.cpp
index 3d1119c..4c7b62b 100644
--- a/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.cpp
+++ b/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.cpp
@@ -248,6 +248,179 @@ private:
     PDFTextEditPseudowidget m_textEdit;
 };
 
+/// Editor for signatures
+class PDFFormFieldSignatureEditor : public PDFFormFieldWidgetEditor
+{
+    Q_DECLARE_TR_FUNCTIONS(pdf::PDFFormFieldSignatureEditor)
+
+private:
+    using BaseClass = PDFFormFieldWidgetEditor;
+
+public:
+    explicit PDFFormFieldSignatureEditor(PDFWidgetFormManager* formManager, PDFFormWidget formWidget);
+    virtual ~PDFFormFieldSignatureEditor() = default;
+
+    virtual bool isEditorDrawEnabled() const override;
+    virtual void draw(AnnotationDrawParameters& parameters, bool edit) const override;
+};
+
+PDFFormFieldSignatureEditor::PDFFormFieldSignatureEditor(PDFWidgetFormManager* formManager, PDFFormWidget formWidget) :
+    BaseClass(formManager, formWidget)
+{
+
+}
+
+bool PDFFormFieldSignatureEditor::isEditorDrawEnabled() const
+{
+    PDFDrawWidgetProxy* proxy = m_formManager->getProxy();
+
+    if (proxy)
+    {
+        const std::vector<PDFSignatureVerificationResult>& signatureVerificationResult = proxy->getSignatureVerificationResult();
+        QString qualifiedName = m_formWidget.getParent()->getName(PDFFormField::NameType::FullyQualified);
+
+        for (const PDFSignatureVerificationResult& result : signatureVerificationResult)
+        {
+            if (result.getSignatureFieldQualifiedName() == qualifiedName)
+            {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+void PDFFormFieldSignatureEditor::draw(AnnotationDrawParameters& parameters, bool edit) const
+{
+    PDFPainterStateGuard guard(parameters.painter);
+    PDFDrawWidgetProxy* proxy = m_formManager->getProxy();
+    const PDFSignatureVerificationResult* verificationResult = nullptr;
+
+    Q_UNUSED(edit);
+
+    if (proxy)
+    {
+        const std::vector<PDFSignatureVerificationResult>& signatureVerificationResult = proxy->getSignatureVerificationResult();
+        QString qualifiedName = m_formWidget.getParent()->getName(PDFFormField::NameType::FullyQualified);
+
+        for (const PDFSignatureVerificationResult& result : signatureVerificationResult)
+        {
+            if (result.getSignatureFieldQualifiedName() == qualifiedName)
+            {
+                verificationResult = &result;
+                break;
+            }
+        }
+    }
+
+    bool isValid = false;
+    QString text = tr("Signature Unknown");
+
+    if (verificationResult)
+    {
+        if (verificationResult->isValid())
+        {
+            isValid = true;
+            text = tr("Signature Valid");
+        }
+        else
+        {
+            isValid = false;
+            text = tr("Signature Invalid");
+        }
+    }
+
+    QColor foregroundColor = parameters.colorConvertor.convert(QColor(Qt::black), false, true);
+    parameters.painter->setPen(foregroundColor);
+    parameters.painter->setBrush(parameters.colorConvertor.convert(QColor(Qt::white), true, false));
+
+    QRectF rect = m_formManager->getWidgetRectangle(m_formWidget);
+    parameters.boundingRectangle = rect;
+    parameters.painter->drawRect(rect);
+
+    QRectF textRect = rect;
+    textRect.setHeight(rect.height() * 0.25);
+    textRect.setWidth(rect.width() * 0.95);
+    textRect.translate((rect.width() - textRect.width()) * 0.5, rect.height() * 0.75);
+
+    QPainterPath path;
+    path.addText(0, 0, parameters.painter->font(), text);
+    QSizeF textSize = path.boundingRect().size();
+    qreal factor = qMin(textRect.width() / textSize.width(), textRect.height() / textSize.height());
+
+    QTransform matrix;
+    matrix.scale(factor, -factor);
+    path = matrix.map(path);
+    path.translate(textRect.center() - path.boundingRect().center());
+
+    parameters.painter->fillPath(path, foregroundColor);
+
+    QPainterPath mark;
+    if (isValid)
+    {
+        parameters.painter->setBrush(Qt::darkGreen);
+        parameters.painter->setPen(Qt::NoPen);
+
+        QPolygonF checkmark;
+        checkmark << QPointF(40, 120)
+                  << QPointF(70, 150)
+                  << QPointF(160, 40)
+                  << QPointF(140, 20)
+                  << QPointF(70, 120)
+                  << QPointF(50, 100);
+
+        mark.addPolygon(checkmark);
+    }
+    else
+    {
+        parameters.painter->setBrush(Qt::darkRed);
+        parameters.painter->setPen(Qt::NoPen);
+
+        const double halfThickness = 10.0;
+        const double halfLength = 50.0;
+
+        QPolygonF checkmark;
+        checkmark << QPointF(-halfLength, -halfThickness)
+                  << QPointF(-halfLength, +halfThickness)
+                  << QPointF(+halfLength, +halfThickness)
+                  << QPointF(+halfLength, -halfThickness)
+                  << QPointF(-halfLength, -halfThickness);
+
+        mark.addPolygon(checkmark);
+
+        checkmark.clear();
+        checkmark << QPointF(-halfThickness, -halfLength)
+                  << QPointF(-halfThickness, +halfLength)
+                  << QPointF(+halfThickness, +halfLength)
+                  << QPointF(+halfThickness, -halfLength)
+                  << QPointF(-halfThickness, -halfLength);
+        mark.addPolygon(checkmark);
+        mark.setFillRule(Qt::WindingFill);
+
+        QTransform transform;
+        transform.rotate(45.0);
+        mark = transform.map(mark);
+    }
+
+    QRectF markRect = rect;
+    markRect.setHeight(rect.height() - textRect.height());
+    QPointF markCenter = markRect.center();
+    markRect.setHeight(markRect.height() * 0.75);
+    markRect.setWidth(markRect.width() * 0.75);
+    markRect.moveCenter(markCenter);
+
+    QRectF markSymbolRect = mark.boundingRect();
+    qreal symbolFactor = qMin(markRect.width() / markSymbolRect.width(), markRect.height() / markSymbolRect.height());
+
+    QTransform markTransform;
+    markTransform.scale(symbolFactor, -symbolFactor);
+    mark = markTransform.map(mark);
+    mark.translate(markRect.center() - mark.boundingRect().center());
+
+    parameters.painter->drawPath(mark);
+}
+
 /// Editor for combo boxes
 class PDFFormFieldComboBoxEditor : public PDFFormFieldWidgetEditor
 {
@@ -761,8 +934,10 @@ void PDFWidgetFormManager::updateFormWidgetEditors()
             }
 
             case PDFFormField::FieldType::Signature:
-                // Signature fields doesn't have editor
+            {
+                m_widgetEditors.push_back(new PDFFormFieldSignatureEditor(this, widget));
                 break;
+            }
 
             default:
                 Q_ASSERT(false);
diff --git a/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.h b/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.h
index 25ac14b..009ae31 100644
--- a/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.h
+++ b/Pdf4QtLibWidgets/sources/pdfwidgetformmanager.h
@@ -144,6 +144,8 @@ public:
     PDFWidgetAnnotationManager* getAnnotationManager() const;
     void setAnnotationManager(PDFWidgetAnnotationManager* annotationManager);
 
+    PDFDrawWidgetProxy* getProxy() const { return m_proxy; }
+
 protected:
     virtual void updateFieldValues() override;
     virtual void onDocumentReset() override;
diff --git a/RELEASES.txt b/RELEASES.txt
index bfc1a79..168285f 100644
--- a/RELEASES.txt
+++ b/RELEASES.txt
@@ -10,6 +10,7 @@ CURRENT:
  - Issue #200: Icons under dark theme on Arch/KDE is broken 
  - Issue #185: Latest git fails to build in linux
  - Issue #165: Insert > Inline Text latency issues on Flatpak and Appimage packages 
+ - Issue #161: Can it be possible to trust a certificate like in acrobat?
 
 V: 1.4.0.0 4.7.2024
  - Issue #190: PageMaster crash + black bubbles instead of bubbles with correct color