diff --git a/SDL/Fakturierung/frmSendEmail.Designer.vb b/SDL/Fakturierung/frmSendEmail.Designer.vb
index f40249fd..5b22f15c 100644
--- a/SDL/Fakturierung/frmSendEmail.Designer.vb
+++ b/SDL/Fakturierung/frmSendEmail.Designer.vb
@@ -51,6 +51,7 @@ Partial Class frmSendEmail
         Me.clmnDsId = New System.Windows.Forms.DataGridViewTextBoxColumn()
         Me.clmnAnhId = New System.Windows.Forms.DataGridViewTextBoxColumn()
         Me.Label7 = New System.Windows.Forms.Label()
+        Me.chkMergePDF = New System.Windows.Forms.CheckBox()
         CType(Me.dgvEmailBCC, System.ComponentModel.ISupportInitialize).BeginInit()
         CType(Me.dgvEmailCC, System.ComponentModel.ISupportInitialize).BeginInit()
         CType(Me.dgvEmail, System.ComponentModel.ISupportInitialize).BeginInit()
@@ -320,12 +321,23 @@ Partial Class frmSendEmail
         Me.Label7.TabIndex = 92
         Me.Label7.Text = "Anhänge:"
         '
+        'chkMergePDF
+        '
+        Me.chkMergePDF.AutoSize = True
+        Me.chkMergePDF.Location = New System.Drawing.Point(70, 510)
+        Me.chkMergePDF.Name = "chkMergePDF"
+        Me.chkMergePDF.Size = New System.Drawing.Size(135, 17)
+        Me.chkMergePDF.TabIndex = 93
+        Me.chkMergePDF.Text = "PDFs zusammenführen"
+        Me.chkMergePDF.UseVisualStyleBackColor = True
+        '
         'frmSendEmail
         '
         Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
         Me.BackColor = System.Drawing.Color.WhiteSmoke
         Me.ClientSize = New System.Drawing.Size(750, 575)
+        Me.Controls.Add(Me.chkMergePDF)
         Me.Controls.Add(Me.Label7)
         Me.Controls.Add(Me.dgvAnhaenge)
         Me.Controls.Add(Me.lblKunde)
@@ -375,4 +387,5 @@ Partial Class frmSendEmail
     Friend WithEvents clmnBezeichnung As DataGridViewTextBoxColumn
     Friend WithEvents clmnDsId As DataGridViewTextBoxColumn
     Friend WithEvents clmnAnhId As DataGridViewTextBoxColumn
+    Friend WithEvents chkMergePDF As CheckBox
 End Class
diff --git a/SDL/Fakturierung/frmSendEmail.vb b/SDL/Fakturierung/frmSendEmail.vb
index 10d22ae6..1a6a183e 100644
--- a/SDL/Fakturierung/frmSendEmail.vb
+++ b/SDL/Fakturierung/frmSendEmail.vb
@@ -272,7 +272,11 @@ Public Class frmSendEmail
                     If SPEDBUCH.DokumentId_Steuerbeleg IsNot Nothing Then
                         ATTACHMENTS.Add(New cFakt_SendMailATTach(VERAG_PROG_ALLGEMEIN.cDATENSERVER.GET_PDFPath_BY_DocID(SPEDBUCH.DokumentId_Steuerbeleg), "Steuerbescheid.pdf"))
                     End If
-                    addAttachments(Mail, lastAktuelle_RgNr, False)
+
+                    Dim mergePdfEnabled As Boolean = chkMergePDF.Checked
+
+
+                    addAttachments(Mail, lastAktuelle_RgNr, mergePdfEnabled)
 
                     Mail.Display()
                 End If
@@ -338,7 +342,9 @@ Public Class frmSendEmail
                 If SPEDBUCH.DokumentId_Steuerbeleg IsNot Nothing Then
                     ATTACHMENTS.Add(New cFakt_SendMailATTach(VERAG_PROG_ALLGEMEIN.cDATENSERVER.GET_PDFPath_BY_DocID(SPEDBUCH.DokumentId_Steuerbeleg), "Steuerbescheid.pdf"))
                 End If
-                addAttachments(Mail, RECHNUNG.RechnungsNr, False)
+                Dim mergePdfEnabled As Boolean = chkMergePDF.Checked
+
+                addAttachments(Mail, RECHNUNG.RechnungsNr, mergePdfEnabled)
 
                 Mail.Display()
             Catch ex As System.Exception
@@ -353,6 +359,18 @@ Public Class frmSendEmail
     Private Sub addAttachments(ByRef Mail As Microsoft.Office.Interop.Outlook.MailItem, ByVal RgNr As Integer, ByVal MergePDF As Boolean)
         If ATTACHMENTS.Count = 0 Then Exit Sub
 
+        If MergePDF And ATTACHMENTS.Count > 1 Then
+            Dim extension = ".pdf"
+            Dim zielPfadZusammenfassung = VERAG_PROG_ALLGEMEIN.DATENVERVER_OPTIONS.getTMPPath(IIf(SammelrechungArt <> 6, "Rechnungs_Anhänge_", "Rechnung_") & RgNr & extension, extension,, False, "Zusammenfassung")
+
+            Dim myList As New List(Of String)
+            For Each a In ATTACHMENTS : myList.Add(a.Pfad) : Next
+
+            If FormularManagerNEU.MergePdfFiles(myList, zielPfadZusammenfassung) Then
+                ATTACHMENTS.Clear() : ATTACHMENTS.Add(New cFakt_SendMailATTach(zielPfadZusammenfassung, "")) '  überscheiben
+            End If
+        End If
+
         Try
             For Each a In ATTACHMENTS
                 If System.IO.File.Exists(a.Pfad) Then