diff --git a/pages/client/[id].vue b/pages/client/[id].vue
index b64c240..ee7f852 100644
--- a/pages/client/[id].vue
+++ b/pages/client/[id].vue
@@ -55,10 +55,10 @@ function updatePagedListVModel(element: Array<string>) {
 const editMode = ref<boolean>(route.query?.edit === "1");
 function editorFields(): Array<fieldDefinition> {
   return [
-    { key: "name", type: "text", label: "Name", value: client.value.name ?? undefined },
-    { key: "address", type: "text", label: "Address", value: client.value.address ?? undefined },
-    { key: "phone", type: "text", label: "Phone", value: client.value.phone ?? undefined },
-    { key: "email", type: "text", label: "E-mail", value: client.value.email ?? undefined },
+    { key: "name", type: "text", label: "Name", value: client.value.name ?? "" },
+    { key: "address", type: "text", label: "Address", value: client.value.address ?? "" },
+    { key: "phone", type: "text", label: "Phone", value: client.value.phone ?? "" },
+    { key: "email", type: "text", label: "E-mail", value: client.value.email ?? "" },
   ];
 }
 
diff --git a/server/api/clients.post.ts b/server/api/clients.post.ts
index 97df465..486e35b 100644
--- a/server/api/clients.post.ts
+++ b/server/api/clients.post.ts
@@ -28,10 +28,10 @@ export function checkIsClient<Patch extends boolean = boolean>(
     });
   }
 
-  if (!(typeof value.name === "string" || value.name === null || (!patch && value.name === undefined))) errors.set("name", "is not string or null");
-  if (!(typeof value.address === "string" || value.address === null || (!patch && value.address === undefined))) errors.set("address", "is not string or null");
-  if (!(typeof value.phone === "string" || value.phone === null || (!patch && value.phone === undefined))) errors.set("phone", "is not string or null");
-  if (!(typeof value.email === "string" || value.email === null || (!patch && value.email === undefined))) errors.set("email", "is not string or null");
+  if (!(typeof value.name === "string" || value.name === null || (patch && value.name === undefined))) errors.set("name", "is not string or null");
+  if (!(typeof value.address === "string" || value.address === null || (patch && value.address === undefined))) errors.set("address", "is not string or null");
+  if (!(typeof value.phone === "string" || value.phone === null || (patch && value.phone === undefined))) errors.set("phone", "is not string or null");
+  if (!(typeof value.email === "string" || value.email === null || (patch && value.email === undefined))) errors.set("email", "is not string or null");
 
   for (const i in value as Partial<Omit<Client, "id">>)
     if (!clientKeys.includes(i)) errors.set(i, `excessive property`);