diff --git a/backend/api/v1/modules/a76/general_catalogs/prevalidators/routes.py b/backend/api/v1/modules/a76/general_catalogs/prevalidators/routes.py
index 539a2d6e..605fdb09 100644
--- a/backend/api/v1/modules/a76/general_catalogs/prevalidators/routes.py
+++ b/backend/api/v1/modules/a76/general_catalogs/prevalidators/routes.py
@@ -29,6 +29,7 @@ prevalidator_crud = TenantCRUDRoutes(
     tags=["Prevalidators"],
     resource_name="Prevalidator",
     enable_list=True,
+    enable_filters=True,
     list_permissions=["cat_prevalidators.view"],
     get_permissions=["cat_prevalidators.view"],
     create_permissions=["cat_prevalidators.create"],
diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/service.py b/backend/api/v1/modules/a76/general_catalogs/signatures/service.py
index 1a2a5e26..80944e54 100644
--- a/backend/api/v1/modules/a76/general_catalogs/signatures/service.py
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/service.py
@@ -36,6 +36,9 @@ class SignatureService:
             if filters.get("code"):
                 query = query.filter(
                     models.Signature.code.ilike(f"%{filters['code']}%"))
+            if filters.get("signature"):
+                query = query.filter(
+                    models.Signature.signature.ilike(f"%{filters['signature']}%"))
 
         total = query.count()
         signatures = query.offset(skip).limit(limit).all()
diff --git a/frontend/src/lib/api/dashboard/a76/general_catalogs/prevalidators.ts b/frontend/src/lib/api/dashboard/a76/general_catalogs/prevalidators.ts
index 7233839f..70bb0a4c 100644
--- a/frontend/src/lib/api/dashboard/a76/general_catalogs/prevalidators.ts
+++ b/frontend/src/lib/api/dashboard/a76/general_catalogs/prevalidators.ts
@@ -37,17 +37,17 @@ export async function getPrevalidators(
     filters: Record<string, any> = {},
     companyId?: number
 ): Promise<ApiResponse<PrevalidatorListResponse>> {
-    const params = new URLSearchParams({
+    const paramObj: Record<string, string> = {
         page: page.toString(),
-        page_size: pageSize.toString(),
-        ...filters
+        page_size: pageSize.toString()
+    };
+    if (companyId) paramObj.company_id = companyId.toString();
+    Object.entries(filters).forEach(([k, v]) => {
+        if (v !== undefined && v !== null && v !== '') paramObj[k] = String(v);
     });
-    if (companyId) {
-        params.append('company_id', companyId.toString());
-    }
+    const params = new URLSearchParams(paramObj);
 
-    const response = await api.get(`/v1/a76/prevalidators/?${params.toString()}`);
-    return response.data;
+    return api.get(`/v1/a76/prevalidators/?${params.toString()}`);
 }
 
 export async function getPrevalidator(id: number, companyId?: number): Promise<Prevalidator> {
diff --git a/frontend/src/lib/api/dashboard/a76/general_catalogs/signatures.ts b/frontend/src/lib/api/dashboard/a76/general_catalogs/signatures.ts
index 7c399fe5..9037f6da 100644
--- a/frontend/src/lib/api/dashboard/a76/general_catalogs/signatures.ts
+++ b/frontend/src/lib/api/dashboard/a76/general_catalogs/signatures.ts
@@ -36,19 +36,20 @@ export interface SignatureListResponse {
 export async function getSignatures(
     page: number = 1,
     pageSize: number = 50,
-    companyId: number, 
+    companyId: number,
     filters: Record<string, any> = {}
 ): Promise<ApiResponse<SignatureListResponse>> {
-    const params = new URLSearchParams({
+    const paramObj: Record<string, string> = {
         page: page.toString(),
         page_size: pageSize.toString(),
-        company_id: companyId.toString(),
-        ...filters
+        company_id: companyId.toString()
+    };
+    Object.entries(filters).forEach(([k, v]) => {
+        if (v !== undefined && v !== null && v !== '') paramObj[k] = String(v);
     });
+    const params = new URLSearchParams(paramObj);
 
-
-    const response = await api.get(`/v1/a76/signatures/?${params.toString()}`);
-    return response.data;
+    return api.get(`/v1/a76/signatures/?${params.toString()}`);
 }
 
 
diff --git a/frontend/src/lib/components/dashboard/general_catalogs/prevalidators/create-edit-dialog.svelte b/frontend/src/lib/components/dashboard/general_catalogs/prevalidators/create-edit-dialog.svelte
index f1e217f6..490cfd5d 100644
--- a/frontend/src/lib/components/dashboard/general_catalogs/prevalidators/create-edit-dialog.svelte
+++ b/frontend/src/lib/components/dashboard/general_catalogs/prevalidators/create-edit-dialog.svelte
@@ -89,7 +89,7 @@
 </script>
 
 <Dialog.Root bind:open>
-	<Dialog.Content class="sm:max-w-[500px]">
+	<Dialog.Content class="sm:max-w-[500px]" onInteractOutside={(e) => e.preventDefault()}>
 		<Dialog.Header>
 			<Dialog.Title>{title}</Dialog.Title>
 		</Dialog.Header>
diff --git a/frontend/src/lib/components/dashboard/general_catalogs/signatures/create-edit-dialog.svelte b/frontend/src/lib/components/dashboard/general_catalogs/signatures/create-edit-dialog.svelte
index faa95017..0be5b8af 100644
--- a/frontend/src/lib/components/dashboard/general_catalogs/signatures/create-edit-dialog.svelte
+++ b/frontend/src/lib/components/dashboard/general_catalogs/signatures/create-edit-dialog.svelte
@@ -96,7 +96,7 @@
 </script>
 
 <Dialog.Root bind:open>
-	<Dialog.Content class="sm:max-w-[500px]">
+	<Dialog.Content class="sm:max-w-[500px]" onInteractOutside={(e) => e.preventDefault()}>
 		<Dialog.Header>
 			<Dialog.Title>{title}</Dialog.Title>
 		</Dialog.Header>
diff --git a/frontend/src/routes/dashboard/general_catalogs/prevalidators/+page.svelte b/frontend/src/routes/dashboard/general_catalogs/prevalidators/+page.svelte
index 71951916..b6f80bd7 100644
--- a/frontend/src/routes/dashboard/general_catalogs/prevalidators/+page.svelte
+++ b/frontend/src/routes/dashboard/general_catalogs/prevalidators/+page.svelte
@@ -7,7 +7,7 @@
 	import * as Card from '$lib/components/ui/card';
 	import { Button } from '$lib/components/ui/button';
 	import { Input } from '$lib/components/ui/input';
-	import { Pencil, Plus, Trash2 } from 'lucide-svelte';
+	import { Pencil, Plus, Trash2, RefreshCw } from 'lucide-svelte';
 	import InfiniteDataTable from '$lib/components/dashboard/common/infinite-data-table.svelte';
 	import { createColumns } from '$lib/components/dashboard/general_catalogs/prevalidators/columns';
 	import CreateEditDialog from '$lib/components/dashboard/general_catalogs/prevalidators/create-edit-dialog.svelte';
@@ -226,7 +226,9 @@
 					size="sm"
 					class="h-9"
 					onclick={reloadData}
+					disabled={loading}
 				>
+					<RefreshCw class="mr-2 h-4 w-4 {loading ? 'animate-spin' : ''}" />
 					Actualizar
 				</Button>
 				{#if canCreate}
@@ -262,7 +264,17 @@
 			</Card.Header>
 			<Card.Content class="p-0 flex-1 overflow-hidden min-h-0">
 				<div class="rounded-md border bg-background overflow-hidden h-full">
-					<InfiniteDataTable data={allItems} {columns} {loading} {hasMore} {loadMore} />
+					<InfiniteDataTable
+						data={allItems}
+						{columns}
+						{loading}
+						{hasMore}
+						{loadMore}
+						{selectedIds}
+						onSelectedIdsChange={(ids) => (selectedIds = ids)}
+						onRowClick={handleRowClick}
+						onRowDoubleClick={handleRowDoubleClick}
+					/>
 				</div>
 			</Card.Content>
 		</Card.Root>
diff --git a/frontend/src/routes/dashboard/general_catalogs/signatures/+page.svelte b/frontend/src/routes/dashboard/general_catalogs/signatures/+page.svelte
index 444c3322..c0bf5bca 100644
--- a/frontend/src/routes/dashboard/general_catalogs/signatures/+page.svelte
+++ b/frontend/src/routes/dashboard/general_catalogs/signatures/+page.svelte
@@ -83,7 +83,7 @@ error = null;
 try {
 const response = await signaturesApi.list(companyStore.activeCompany.id, {
 code: searchCode || undefined,
-description: searchDesc || undefined,
+signature: searchDesc || undefined,
 page: '1',
 page_size: pageSize.toString()
 });
@@ -101,8 +101,8 @@ loading = false;
 const url = new URL($page.url);
 if (searchCode) url.searchParams.set('code', searchCode);
 else url.searchParams.delete('code');
-if (searchDesc) url.searchParams.set('description', searchDesc);
-else url.searchParams.delete('description');
+if (searchDesc) url.searchParams.set('signature', searchDesc);
+else url.searchParams.delete('signature');
 history.replaceState(history.state, '', url);
 }, 500);
 }
@@ -113,7 +113,7 @@ loading = true;
 try {
 const response = await signaturesApi.list(companyStore.activeCompany.id, {
 code: searchCode || undefined,
-description: searchDesc || undefined,
+signature: searchDesc || undefined,
 page: (currentPage + 1).toString(),
 page_size: pageSize.toString()
 });
@@ -134,7 +134,7 @@ error = null;
 try {
 const response = await signaturesApi.list(companyStore.activeCompany.id, {
 code: searchCode || undefined,
-description: searchDesc || undefined,
+signature: searchDesc || undefined,
 page: '1',
 page_size: pageSize.toString()
 });
@@ -165,8 +165,8 @@ const columns = $derived(createColumns(handleSuccess, { canEdit, canDelete }));
 <p class="text-muted-foreground">Catálogo de Firmas del sistema</p>
 </div>
 <div class="flex items-center gap-3">
-<Button variant="outline" size="sm" class="h-9" onclick={reloadData}>
-<RefreshCw class="mr-2 h-4 w-4" /> Actualizar
+<Button variant="outline" size="sm" class="h-9" onclick={reloadData} disabled={loading}>
+<RefreshCw class="mr-2 h-4 w-4 {loading ? 'animate-spin' : ''}" /> Actualizar
 </Button>
 {#if !isError && canCreate}
 <Button class="h-9" onclick={() => { editingItem = null; createDialogOpen = true; }}>
@@ -189,7 +189,7 @@ onRetry={reloadData}
 <Card.Title>Listado de Firmas</Card.Title>
 <div class="flex flex-wrap items-center gap-2">
 <Input placeholder="Código" bind:value={searchCode} oninput={handleSearch} class="h-9 w-36 bg-card lg:w-44" />
-<Input placeholder="Descripción" bind:value={searchDesc} oninput={handleSearch} class="h-9 w-44 bg-card lg:w-64" />
+<Input placeholder="Firma" bind:value={searchDesc} oninput={handleSearch} class="h-9 w-44 bg-card lg:w-64" />
 </div>
 </div>
 </Card.Header>