diff --git a/modules/ticket/front/services/index.html b/modules/ticket/front/services/index.html
index bc288a8a23..5128873c44 100644
--- a/modules/ticket/front/services/index.html
+++ b/modules/ticket/front/services/index.html
@@ -29,7 +29,7 @@
                 disabled="watcher.dataChanged() || !$ctrl.checkeds.length"
                 label="Pay"
                 ng-click="$ctrl.createRefund()"
-                vn-acl="invoicing, claimManager, salesAssistant"
+                vn-acl="invoicing, claimManager, salesAssistant, buyer"
                 vn-acl-action="remove">
         </vn-button>
         </vn-button-bar>
@@ -37,7 +37,9 @@
             <vn-check
                 tabindex="1"
                 on-change="$ctrl.addChecked(service.id)"
-                disabled="!service.id">
+                disabled="!service.id"
+                vn-acl="invoicing, claimManager, salesAssistant, buyer"
+                vn-acl-action="remove">
             </vn-check>
             <vn-autocomplete vn-two vn-focus
                 data="ticketServiceTypes"
@@ -68,7 +70,8 @@
                 vn-one
                 label="Price"
                 ng-model="service.price"
-                step="0.01">
+                step="0.01"
+                min="0">
             </vn-input-number>
             <vn-auto>
                 <vn-icon-button