diff --git a/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php b/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
index 0064e8c4715..8669cae7c2f 100644
--- a/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
+++ b/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
@@ -281,7 +281,7 @@ if ($resql) {
 		$journaltoshow = (($result > 0) ? $accountingjournal->getNomUrl(0, 0, 0, '', 0) : $obj->code_journal);
 		print '<td class="center">'.$journaltoshow.'</td>';
 
-		if (empty($obj->lettering_code)) {
+		if (empty($obj->lettering_code) && empty($obj->date_validated)) {
 			print '<td class="nowrap center"><input type="checkbox" class="flat checkforselect" name="toselect[]" id="toselect[]" value="'.$obj->rowid.'" /></td>';
 			print '<td><a href="'.DOL_URL_ROOT.'/accountancy/bookkeeping/card.php?piece_num='.$obj->piece_num.'">';
 			print img_edit();