diff --git a/LSL2/STPROC/LABELING_SERVICES.txt b/LSL2/STPROC/LABELING_SERVICES.txt
index ade35fd..b8e2fc6 100644
--- a/LSL2/STPROC/LABELING_SERVICES.txt
+++ b/LSL2/STPROC/LABELING_SERVICES.txt
@@ -8,6 +8,7 @@ Declare subroutine Error_Services, Labeling_Services, Lot_Services
 $insert LOGICAL
 $Insert LOT_EQUATES
 $Insert TEST_WAFER_PROD_EQUATES
+$Insert RETURN_TO_FAB_LOTS_EQUATES
 
 LogPath      = Environment_Services('GetApplicationRootPath') : '\LogFiles\LabelPrinting'
 LogDate      = Oconv(Date(), 'D4/')
@@ -217,5 +218,39 @@ Service PrintReactorLabel(ReactNo, LoadLockSide=LOAD_LOCK_SIDE)
 	
 end service
 
+Service GetReturnToFabLabelZPL(RTFId)
+    ZPLStringLabel    = ''
+    LotRec            = Database_Services('ReadDataRow', 'RETURN_TO_FAB_LOTS', RTFId)
+    CassId            = LotRec<RETURN_TO_FAB_LOTS_CASS_ID$>
+    CassType          = LotRec<RETURN_TO_FAB_LOTS_LOT_TYPE$>
+    ReturnToFabReason = LotRec<RETURN_TO_FAB_LOTS_REASON$>
+    CassIdText        = CassId
+    BarcodeText       = ""
+    Begin Case
+        Case CassType EQ 'RDS'
+            BarcodeText = '1T' : CassId
+        Case CassType EQ 'WM_OUT'
+            swap '*' with '.' in CassId
+            CassIdText  = CassId
+            BarcodeText = 'O' : CassId
+    End Case
+    
+    ZPLStringLabel := '^XA'
+    ZPLStringLabel := '^LH0,0'
+    ZPLStringLabel := '^PR1'
+    ZPLStringLabel := '^LL406'
+    ZPLStringLabel := '^PW900'
+    ZPLStringLabel := '^MD22'
+    ZPLStringLabel := '^MMT'
+    ZPLStringLabel := '^FO25,25^A070,75^FDReturn To Fab^FS^FX(Title)^FS'
+    ZPLStringLabel := '^FO25,100^A045,70,40^FD(1T)Lot Number:':CassIdText:' ^FS^FX(Lot Number Title)^FS'
+    ZPLStringLabel := '^FB780,5,0,L^FO25,180^A045,30,30^FD':ReturnToFabReason:'^FS'
+    ZPLStringLabel := '^FO60,325^BY2^B3,,50,N^FD':BarcodeText:'^FS^FX(Lot Number 1D Barcode)^FS'
+    ZPLStringLabel := '^FO500,105^CI28'
+    ZPLStringLabel := '^XZ'
+    Response        = ZPLStringLabel
+end service
+
+
 
 
diff --git a/LSL2/STPROC/RETURNTOFAB_API.txt b/LSL2/STPROC/RETURNTOFAB_API.txt
index a416473..3b4fe30 100644
--- a/LSL2/STPROC/RETURNTOFAB_API.txt
+++ b/LSL2/STPROC/RETURNTOFAB_API.txt
@@ -38,7 +38,7 @@ Function Returntofab_API(@API)
 
 #pragma precomp SRP_PreCompiler
 
-Declare function OI_Wizard_Services, Return_To_Fab_Services, Database_Services
+Declare function OI_Wizard_Services, Return_To_Fab_Services, Database_Services, Labeling_Services
 Declare subroutine Return_To_Fab_Services
 
 $insert APP_INSERTS
@@ -367,3 +367,38 @@ CreateResultOptionCollection:
     end
 
 return
+
+
+API returntofab.getreturntofablabelzpl.HEAD
+API returntofab.getreturntofablabelzpl.GET
+    OIWizardID = ''
+    Cookies    = HTTP_Services('GetHTTPCookie')
+    For each Cookie in Cookies using ';'
+        Key = Field(Cookie, '=', 1)
+        If Key EQ 'sessionID' then
+            OIWizardID = Field(Cookie, '=', 2)
+        end
+    Next Cookie
+
+    ValidSession = OI_Wizard_Services('ValidateSession', OIWizardID)
+
+    If ValidSession then
+        // Check if payload has the required information to create a react mode change record
+        RTFId = HTTP_Services('GetQueryField', 'ReturnToFabId')
+        If RTFId NE '' then
+            // The POST string will have been encoded so use percent (URL) decoding.
+                //Reactor_Services('CreateReactModeChange', UserID, ReactNo, Mode, ModeSubCat, ModeText)
+                ZPLString = Labeling_Services('GetReturnToFabLabelZPL', RTFId) 
+                If Error_Services('NoError') And ZPLString NE '' then
+                    // Maybe return the corresponding reactor object with the new current mode info.
+                    HTTP_Services('SetResponseStatus', 201, ZPLString)
+                end else
+                    HTTP_Services('SetResponseStatus', 400, Error_Services('GetMessage'))
+                end
+        end else
+            HTTP_Services('SetResponseStatus', 400, 'RTFId was null')
+        end
+    end else
+        HTTP_Services('SetResponseStatus', 401, 'Invalid session. Reauthentication required.')
+    end
+end api