diff --git a/htdocs/core/ajax/onlineSign.php b/htdocs/core/ajax/onlineSign.php
index 7866b972db1..0c0b63bbe0c 100644
--- a/htdocs/core/ajax/onlineSign.php
+++ b/htdocs/core/ajax/onlineSign.php
@@ -313,6 +313,93 @@ if ($action == "importSignature") {
 					// Document format not supported to insert online signature.
 					// We should just create an image file with the signature.
 				}
+			} 
+		} elseif ($mode == 'fichinter') {
+			require_once DOL_DOCUMENT_ROOT.'/fichinter/class/fichinter.class.php';
+			require_once DOL_DOCUMENT_ROOT.'/core/lib/pdf.lib.php';
+			$object = new Fichinter($db);
+			$object->fetch(0, $ref);
+
+			$upload_dir = !empty($conf->ficheinter->multidir_output[$object->entity])?$conf->ficheinter->multidir_output[$object->entity]:$conf->ficheinter->dir_output;
+			$upload_dir .= '/'.dol_sanitizeFileName($object->ref).'/';
+			$date = dol_print_date(dol_now(), "%Y%m%d%H%M%S");
+			$filename = "signatures/".$date."_signature.png";
+			if (!is_dir($upload_dir."signatures/")) {
+				if (!dol_mkdir($upload_dir."signatures/")) {
+					$response ="Error mkdir. Failed to create dir ".$upload_dir."signatures/";
+					$error++;
+				}
+			}
+
+			if (!$error) {
+				$return = file_put_contents($upload_dir.$filename, $data);
+				if ($return == false) {
+					$error++;
+					$response = 'Error file_put_content: failed to create signature file.';
+				}
+			}
+
+			if (!$error) {
+				// Defined modele of doc
+				$last_main_doc_file = $object->last_main_doc;
+				$directdownloadlink = $object->getLastMainDocLink('fichinter');	// url to download the $object->last_main_doc
+				if (preg_match('/\.pdf/i', $last_main_doc_file)) {
+					// TODO Use the $last_main_doc_file to defined the $newpdffilename and $sourcefile
+					$newpdffilename = $upload_dir.$ref."_signed-".$date.".pdf";
+					$sourcefile = $upload_dir.$ref.".pdf";
+
+					if (dol_is_file($sourcefile)) {
+						// We build the new PDF
+						$pdf = pdf_getInstance();
+						if (class_exists('TCPDF')) {
+							$pdf->setPrintHeader(false);
+							$pdf->setPrintFooter(false);
+						}
+						$pdf->SetFont(pdf_getPDFFont($langs));
+
+						if (getDolGlobalString('MAIN_DISABLE_PDF_COMPRESSION')) {
+							$pdf->SetCompression(false);
+						}
+
+
+						//$pdf->Open();
+						$pagecount = $pdf->setSourceFile($sourcefile);		// original PDF
+						$s = array(); 	// Array with size of each page. Exemple array(w'=>210, 'h'=>297);
+						for ($i=1; $i<($pagecount+1); $i++) {
+							try {
+								$tppl = $pdf->importPage($i);
+								$s = $pdf->getTemplatesize($tppl);
+								$pdf->AddPage($s['h'] > $s['w'] ? 'P' : 'L');
+								$pdf->useTemplate($tppl);
+							} catch (Exception $e) {
+								dol_syslog("Error when manipulating some PDF by onlineSign: ".$e->getMessage(), LOG_ERR);
+								$response = $e->getMessage();
+								$error++;
+							}
+						}
+
+						// A signature image file is 720 x 180 (ratio 1/4) but we use only the size into PDF
+						// TODO Get position of box from PDF template
+						$xforimgstart = 105;
+						$yforimgstart = (empty($s['h']) ? 250 : $s['h'] - 57);
+						$wforimg = $s['w']/1 - ($xforimgstart + 16);
+						$pdf->Image($upload_dir.$filename, $xforimgstart, $yforimgstart, $wforimg, round($wforimg / 4));
+						//$pdf->Close();
+						$pdf->Output($newpdffilename, "F");
+
+						// Index the new file and update the last_main_doc property of object.
+						$object->indexFile($newpdffilename, 1);
+					}
+					if (!$error) {
+						$response = "success";
+					}
+				} elseif (preg_match('/\.odt/i', $last_main_doc_file)) {
+					// Adding signature on .ODT not yet supported
+					// TODO
+				} else {
+					// Document format not supported to insert online signature.
+					// We should just create an image file with the signature.
+				}
 			}
 		}
 	} else {
diff --git a/htdocs/core/lib/signature.lib.php b/htdocs/core/lib/signature.lib.php
index 070cbe0801f..9cc8f1f03a9 100644
--- a/htdocs/core/lib/signature.lib.php
+++ b/htdocs/core/lib/signature.lib.php
@@ -131,6 +131,21 @@ function getOnlineSignatureUrl($mode, $type, $ref = '', $localorexternal = 1)
 		} else {
 			$out .= '&securekey='.dol_hash($securekeyseed.$type.$ref.(!isModEnabled('multicompany') ? '' : $object->entity), '0');
 		}
+	} elseif ($type == 'fichinter') {
+		$securekeyseed = isset($conf->global->FICHINTER_ONLINE_SIGNATURE_SECURITY_TOKEN) ? $conf->global->FICHINTER_ONLINE_SIGNATURE_SECURITY_TOKEN : '';
+		$out = $urltouse.'/public/onlinesign/newonlinesign.php?source=fichinter&ref='.($mode ? '<span style="color: #666666">' : '');
+		if ($mode == 1) {
+			$out .= 'fichinter_ref';
+		}
+		if ($mode == 0) {
+			$out .= urlencode($ref);
+		}
+		$out .= ($mode ? '</span>' : '');
+		if ($mode == 1) {
+			$out .= "hash('".$securekeyseed."' + '".$type."' + fichinter_ref)";
+		} else {
+			$out .= '&securekey='.dol_hash($securekeyseed.$type.$ref.(!isModEnabled('multicompany') ? '' : $object->entity), '0');
+		}
 	}
 
 	// For multicompany