diff --git a/src/routes/(token-based)/list/[vorgang]/+page.svelte b/src/routes/(token-based)/list/[vorgang]/+page.svelte
index 181b2a0..15d68b9 100644
--- a/src/routes/(token-based)/list/[vorgang]/+page.svelte
+++ b/src/routes/(token-based)/list/[vorgang]/+page.svelte
@@ -42,6 +42,7 @@
 	let formErrors: Record<string, any> | null = $state(null);
 	let etag: string | null = $state(null);
 	let files: FileList | null = $state(null);
+	let fileInput = $state(null);
 
 	// Model Variablen für Upload
 	let openUL = $state(false);
@@ -102,6 +103,7 @@
 		openUL = false;
 		name = '';
 		files = null;
+		fileInput.value = "";
 		await invalidateAll();
 		crimesList = data.crimesList;
 	}
@@ -291,13 +293,21 @@ Mit freundlichen Grüßen,
 	// drag and drop functionality
 		let isDragging = $state(false);
 
-		function handleDrop(event) {
+		async function handleDrop(event) {
 			event.preventDefault();
 			isDragging = false;
 
 			if (event.dataTransfer?.files?.length) {
 				files = event.dataTransfer.files;
 			}
+			if (!(await check_valid_glb_file())) {
+				formErrors = { file: 'Keine gültige .GLD-Datei' }
+				// reset form fields etc.
+				files = null;
+				fileInput.value = '';
+			} else {
+				formErrors = { ...formErrors, file: ''}
+			};
 		}
 
 </script>
@@ -449,7 +459,7 @@ Mit freundlichen Grüßen,
 										class="relative cursor-pointer rounded-md bg-white font-semibold text-indigo-600 focus-within:outline-none focus-within:ring-2 focus-within:ring-indigo-600 focus-within:ring-offset-2 hover:text-indigo-500"
 									>
 										<span>Wähle eine Datei aus</span>
-										<input id="file" bind:files name="file" type="file" class="sr-only" />
+										<input id="file" bind:this={fileInput} bind:files name="file" type="file" class="sr-only" />
 									</label>
 									<p class="pl-1">oder ziehe sie ins Feld</p>
 								</div>