diff --git a/src/app/api/notary/OfficeFolderAnchorsController.ts b/src/app/api/notary/OfficeFolderAnchorsController.ts
index f43c28d8..459f19f4 100644
--- a/src/app/api/notary/OfficeFolderAnchorsController.ts
+++ b/src/app/api/notary/OfficeFolderAnchorsController.ts
@@ -87,7 +87,7 @@ export default class OfficeFoldersController extends ApiController {
 			}
 
 			const sortedHashes = [...folderHashes].sort();
-			const anchoringProof = await this.secureService.download(sortedHashes, officeFolder.name);
+			const anchoringProof = await this.secureService.download(sortedHashes, officeFolder.office!.name);
 
 			const addFileToZip = (zip: Zip) => (uid: string): Promise<void> =>
 				(async () => {