diff --git a/api.php b/api.php
index 5811d6b..2f8c4b5 100644
--- a/api.php
+++ b/api.php
@@ -1073,6 +1073,22 @@ switch($request[0]) {
 				}
 			break;
 
+			/*	APIDOC: project/signatureform
+				description(generate and download the signature page PDF for the currently logged in user/project, as a BASE64 ENCODED string)
+				return(pdf base64 encoded string)
+			*/
+			case 'signatureform':
+				ob_start();
+				//this tells it to simply return the [S]tring instead of outputting headers to force pdf display in a browser
+				$PDFDEST="S";
+				include "register_participants_signature.php";
+				$c=ob_get_contents();
+				ob_end_clean();
+				$b64=base64_encode($c);
+				$ret['status']="ok";
+				$ret['pdf']=$b64;
+			break;
+
 			default:
 				$ret['status']="error";
 				$ret['error']="invalid project API command ({$request[1]})";
diff --git a/register_participants_main.php b/register_participants_main.php
index 41c23a2..9ab58ce 100644
--- a/register_participants_main.php
+++ b/register_participants_main.php
@@ -191,10 +191,10 @@ echo "<table><tr><td>";
 	echo "</td></tr>";
 
 	//FIXME: this should be a global detection so we can use the results elsewhere, especially for all the reports! 
-	if(function_exists("pdf_new"))
+	if(file_exists("tcpdf/tcpdf.php"))
 		$sigfile="register_participants_signature.php";
-	else if(file_exists("tcpdf/tcpdf.php"))
-		$sigfile="register_participants_signature_tcpdf.php";
+	else if(function_exists("pdf_new"))
+		$sigfile="register_participants_signature_pdflib.php";
 	else
 		$sigfile="";
 
diff --git a/register_participants_signature.php b/register_participants_signature.php
index 1e9d3a3..5a1b614 100644
--- a/register_participants_signature.php
+++ b/register_participants_signature.php
@@ -64,8 +64,6 @@
 }
  //END OF AUTH, now lets try to generate a PDF using only PHP :) this should be fun!
 
-
-
 $pdf=new pdf( "Participant Signature Page ($registration_number)" );
 
 $pdf->setFontSize(11);
@@ -215,5 +213,8 @@ function sig($pdf, $text)
 	$pdf->WriteHTML("<br><hr>");	
  }
 
- echo $pdf->output();
+ if(isset($PDFDEST))
+	 echo $pdf->output('',$PDFDEST);
+ else
+	 echo $pdf->output();
 ?>
diff --git a/tcpdf.inc.php b/tcpdf.inc.php
index 238e7e6..aae3d24 100644
--- a/tcpdf.inc.php
+++ b/tcpdf.inc.php
@@ -538,8 +538,7 @@ class pdf extends TCPDF {
 			$filename=strtolower($this->subject);
 			$filename=ereg_replace("[^a-z0-9]","_",$filename).'.pdf';
 		}
-		parent::Output($filename, $dest);
+		return parent::Output($filename, $dest);
 	}
 
-	
 }