diff --git a/dev/dolibarr_changes.txt b/dev/dolibarr_changes.txt
index 4f80f06d444..cce6351950c 100644
--- a/dev/dolibarr_changes.txt
+++ b/dev/dolibarr_changes.txt
@@ -188,7 +188,10 @@ with:
 with
 	} elseif (($key == '/Index') AND ($v[0] == PDF_TYPE_ARRAY AND count($v[1]) >= 2)) {
 
-
+* Fix php fatal error on php 8.0 on tcpdi.php
+	while (list($k, $v) = each($value[1])) {
+with
+	foreach ($value[1] as $k => $v) {
 
 JSGANTT:
 --------
diff --git a/htdocs/core/ajax/onlineSign.php b/htdocs/core/ajax/onlineSign.php
new file mode 100644
index 00000000000..488b5051ea5
--- /dev/null
+++ b/htdocs/core/ajax/onlineSign.php
@@ -0,0 +1,132 @@
+<?php
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ *	\file       /htdocs/core/ajax/onlineSign.php
+ *	\brief      File to make Ajax action on Knowledge Management
+ */
+
+if (!defined('NOTOKENRENEWAL')) {
+	define('NOTOKENRENEWAL', '1'); // Disables token renewal
+}
+if (!defined('NOREQUIREHTML')) {
+	define('NOREQUIREHTML', '1');
+}
+if (!defined('NOREQUIREAJAX')) {
+	define('NOREQUIREAJAX', '1');
+}
+if (!defined('NOREQUIRESOC')) {
+	define('NOREQUIRESOC', '1');
+}
+if (!defined('NOCSRFCHECK')) {
+	define('NOCSRFCHECK', '1');
+}
+// Do not check anti CSRF attack test
+if (!defined('NOREQUIREMENU')) {
+	define('NOREQUIREMENU', '1');
+}
+// If there is no need to load and show top and left menu
+if (!defined("NOLOGIN")) {
+	define("NOLOGIN", '1');
+}
+if (!defined('NOIPCHECK')) {
+	define('NOIPCHECK', '1'); // Do not check IP defined into conf $dolibarr_main_restrict_ip
+}
+if (!defined('NOBROWSERNOTIF')) {
+	define('NOBROWSERNOTIF', '1');
+}
+include '../../main.inc.php';
+
+$action = GETPOST('action', 'aZ09');
+$signature = GETPOST('signaturebase64');
+$ref = GETPOST('ref', 'aZ09');
+$mode = GETPOST('mode', 'aZ09');
+$error = 0;
+$response = "";
+/*
+ * Actions
+ */
+
+// None
+
+
+/*
+ * View
+ */
+
+if ($action == "importSignature") {
+	if (!empty($signature) && $signature[0] == "image/png;base64") {
+		$signature = $signature[1];
+		$data = base64_decode($signature);
+		$upload_dir = DOL_DATA_ROOT."/".$mode."/".$ref."/";
+		$date = dol_print_date(dol_now(), "%Y%m%d%H%M%S");
+		$filename = "signatures/".$date."_signature.png";
+		if (!is_dir($upload_dir."signatures/")) {
+			if (!mkdir($upload_dir."signatures/")) {
+				$response ="error mkdir";
+				$error++;
+			}
+		}
+		if (!$error) {
+			$return = file_put_contents($upload_dir.$filename, $data);
+			if ($return == false) {
+				$response = 'error file_put_content';
+			} else {
+				if ($mode == "propale") {
+					require_once DOL_DOCUMENT_ROOT.'/comm/propal/class/propal.class.php';
+					require_once DOL_DOCUMENT_ROOT.'/core/lib/pdf.lib.php';
+					$object = new Propal($db);
+					$object->fetch(0, $ref);
+
+					$pdf = pdf_getInstance();
+					$pdf->Open();
+					$pdf->AddPage();
+					$pagecount = $pdf->setSourceFile($upload_dir.$ref.".pdf");
+
+					$tppl = $pdf->importPage(1);
+					$pdf->useTemplate($tppl);
+					$pdf->Image($upload_dir.$filename, 129, 239.6, 60, 15);
+					$pdf->Close();
+					$pdf->Output($upload_dir.$ref."_signed-".$date.".pdf", "F");
+
+					$sql  = "UPDATE ".MAIN_DB_PREFIX."propal";
+					$sql .= " SET fk_statut = ".((int) $object::STATUS_SIGNED).", note_private = '".$object->note_private."', date_signature='".$db->idate(dol_now())."'";
+					$sql .= " WHERE rowid = ".((int) $object->id);
+
+					dol_syslog(__METHOD__, LOG_DEBUG);
+					$resql = $db->query($sql);
+					if (!$resql) {
+						$error++;
+					} else {
+						$num = $db->affected_rows($resql);
+					}
+
+					if (!$error) {
+						$db->commit();
+						$response = "success";
+						setEventMessage("PropalSigned");
+					} else {
+						$db->rollback();
+						$response = "error sql";
+					}
+				}
+			}
+		}
+	} else {
+		$response = 'error signature_not_found';
+	}
+}
+echo $response;
diff --git a/htdocs/includes/tcpdi/tcpdi.php b/htdocs/includes/tcpdi/tcpdi.php
index f4c0bd00391..aaa1d70c095 100644
--- a/htdocs/includes/tcpdi/tcpdi.php
+++ b/htdocs/includes/tcpdi/tcpdi.php
@@ -483,7 +483,7 @@ class TCPDI extends FPDF_TPL {
 
                 reset ($value[1]);
 
-                while (list($k, $v) = each($value[1])) {
+                foreach ($value[1] as $k => $v) {
                     $this->_straightOut($k . ' ');
                     $this->pdf_write_value($v);
                 }
diff --git a/htdocs/langs/en_US/propal.lang b/htdocs/langs/en_US/propal.lang
index edbc08236d3..7141c1d38ae 100644
--- a/htdocs/langs/en_US/propal.lang
+++ b/htdocs/langs/en_US/propal.lang
@@ -89,4 +89,11 @@ IdProposal=Proposal ID
 IdProduct=Product ID
 PrParentLine=Proposal Parent Line
 LineBuyPriceHT=Buy Price Amount net of tax for line
-
+SignPropal=Sign proposal
+RefusePropal=Refuse proposal
+Sign=Sign
+PropalAlreadyRefused=Proposal already refused
+PropalAlreadySigned=Proposal already signed
+PropalSigned=Proposal signed
+PropalRefused=Proposal refused
+ConfirmRefusePropal=Are you sure you want to refuse this commercial proposal?
diff --git a/htdocs/langs/fr_FR/propal.lang b/htdocs/langs/fr_FR/propal.lang
index f822d4f1d02..3728eba94d3 100644
--- a/htdocs/langs/fr_FR/propal.lang
+++ b/htdocs/langs/fr_FR/propal.lang
@@ -89,4 +89,11 @@ IdProposal=ID de la proposition commerciale
 IdProduct=ID produit
 PrParentLine=Ligne parent de proposition
 LineBuyPriceHT=Prix d'achat HT de la ligne
-
+SignPropal=Signer la proposition commerciale
+RefusePropal=Refuser la proposition commerciale
+Sign=Signer
+PropalAlreadyRefused=Proposition commerciale déjà refusée
+PropalAlreadySigned=Proposition commerciale déjà signée
+PropalSigned=Proposition commerciale signée
+PropalRefused=Proposition commerciale refusée
+ConfirmRefusePropal=Êtes-vous sûr de vouloir refuser cette proposition commerciale ?
diff --git a/htdocs/public/onlinesign/newonlinesign.php b/htdocs/public/onlinesign/newonlinesign.php
index d034db38be3..4040bcf1425 100644
--- a/htdocs/public/onlinesign/newonlinesign.php
+++ b/htdocs/public/onlinesign/newonlinesign.php
@@ -49,15 +49,18 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/company.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/payments.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
+require_once DOL_DOCUMENT_ROOT.'/comm/propal/class/propal.class.php';
 
 // Load translation files
-$langs->loadLangs(array("main", "other", "dict", "bills", "companies", "errors", "paybox"));
+$langs->loadLangs(array("main", "other", "dict", "bills", "companies", "errors", "paybox","propal"));
 
 // Security check
 // No check on module enabled. Done later according to $validpaymentmethod
 
 // Get parameters
 $action = GETPOST('action', 'aZ09');
+$cancel = GETPOST('cancel', 'alpha');
+$refusepropal = GETPOST('refusepropal', 'alpha');
 
 // Input are:
 // type ('invoice','order','contractline'),
@@ -80,7 +83,9 @@ if (!$action) {
 		exit;
 	}
 }
-
+if (!empty($refusepropal)) {
+	$action = "refusepropal";
+}
 
 // Define $urlwithroot
 //$urlwithouturlroot=preg_replace('/'.preg_quote(DOL_URL_ROOT,'/').'$/i','',trim($dolibarr_main_url_root));
@@ -112,14 +117,29 @@ $urlko = preg_replace('/&$/', '', $urlko); // Remove last &
 
 $creditor = $mysoc->name;
 
+$object = new Propal($db);
+$object->fetch(0, $ref);
 
 /*
  * Actions
  */
 
-
-if ($action == 'dosign') {
-	// TODO
+if ($action == 'confirm_refusepropal') {
+	$sql  = "UPDATE ".MAIN_DB_PREFIX."propal";
+	$sql .= " SET fk_statut = ".((int) $object::STATUS_NOTSIGNED).", note_private = '".$object->note_private."', date_signature='".$db->idate(dol_now())."'";
+	$sql .= " WHERE rowid = ".((int) $object->id);
+	dol_syslog(__METHOD__, LOG_DEBUG);
+	$resql = $db->query($sql);
+	if (!$resql) {
+		$error++;
+	}
+	if (!$error) {
+		$db->commit();
+		setEventMessage("PropalRefused");
+	} else {
+		$db->rollback();
+	}
+	$object->fetch(0, $ref);
 }
 
 
@@ -127,6 +147,7 @@ if ($action == 'dosign') {
  * View
  */
 
+$form = new Form($db);
 $head = '';
 if (!empty($conf->global->MAIN_SIGN_CSS_URL)) {
 	$head = '<link rel="stylesheet" type="text/css" href="'.$conf->global->MAIN_SIGN_CSS_URL.'?lang='.$langs->defaultlang.'">'."\n";
@@ -138,6 +159,10 @@ $conf->dol_hide_leftmenu = 1;
 $replacemainarea = (empty($conf->dol_hide_leftmenu) ? '<div>' : '').'<div>';
 llxHeader($head, $langs->trans("OnlineSignature"), '', '', 0, 0, '', '', '', 'onlinepaymentbody', $replacemainarea, 1);
 
+if ($action == 'refusepropal') {
+	print $form->formconfirm($_SERVER["PHP_SELF"].'?ref='.$ref, $langs->trans('RefusePropal'), $langs->trans('ConfirmRefusePropal', $object->ref), 'confirm_refusepropal', '', '', 1);
+}
+
 // Check link validity for param 'source'
 if (!empty($source) && in_array($ref, array('member_ref', 'contractline_ref', 'invoice_ref', 'order_ref', ''))) {
 	$langs->load("errors");
@@ -290,7 +315,69 @@ if ($action != 'dosign') {
 }
 
 print '</td></tr>'."\n";
+print '<tr><td align="center">';
+if ($action == "dosign" && empty($cancel)) {
+	print '<div class="tablepublicpayment">';
+	print '<input type="button" class="button" id="clearsignature" value="'.$langs->trans("ClearSignature").'">';
+	print '<div id="signature" style="border:solid;"></div>';
+	print '</div>';
+	print '<input type="button" class="button" id="signpropal" value="'.$langs->trans("Sign").'">';
+	print '<input type="submit" class="button" name="cancel" value="'.$langs->trans("Cancel").'">';
+	print '<script language="JavaScript" type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/jSignature/jSignature.js"></script>
+	<script type="text/javascript">
+	$(document).ready(function() {
+	  $("#signature").jSignature({color:"#000",lineWidth:4});
 
+	  $("#signature").on("change",function(){
+		$("#clearsignature").css("display","");
+		$("#signpropal").attr("disabled",false);
+		if(!$._data($("#signpropal")[0], "events")){
+			$("#signpropal").on("click",function(){
+				var signature = $("#signature").jSignature("getData", "image");
+				$.ajax({ 
+					type: "POST", 
+					url: "'.DOL_URL_ROOT.'/core/ajax/onlineSign.php",
+					dataType: "text",
+					data: {
+						"action" : "importSignature",
+						"signaturebase64" : signature,
+						"ref" : "'.$REF.'",
+						"mode" : "propale",
+					},
+					success: function(response) {
+						if(response == "success"){
+							console.log("Success on saving signature");
+							window.location.replace("'.$_SERVER["SELF"].'?ref='.$ref.'");
+						}else{
+							console.error(response);
+						}
+					},
+				});
+			});
+		}
+	  });
+
+	  $("#clearsignature").on("click",function(){
+		$("#signature").jSignature("clear");
+		$("#signpropal").attr("disabled",true);
+		$("#clearsignature").css("display","none");
+	  });
+
+	  $("#clearsignature").css("display","none");
+	  $("#signpropal").attr("disabled",true);
+	});
+	</script>';
+} else {
+	if ($object->status == $object::STATUS_SIGNED) {
+		print $langs->trans("PropalAlreadySigned");
+	} elseif ($object->status == $object::STATUS_NOTSIGNED) {
+		print $langs->trans("PropalAlreadyRefused");
+	} else {
+		print '<input type="submit" class="button" value="'.$langs->trans("SignPropal").'">';
+		print '<input name="refusepropal" type="submit" class="button" value="'.$langs->trans("RefusePropal").'">';
+	}
+}
+print '</td></tr>'."\n";
 print '</table>'."\n";
 print '</form>'."\n";
 print '</div>'."\n";