diff --git a/resources/views/livewire/customer-card/customer-card.blade.php b/resources/views/livewire/customer-card/customer-card.blade.php
index ab379b8..37d8c06 100644
--- a/resources/views/livewire/customer-card/customer-card.blade.php
+++ b/resources/views/livewire/customer-card/customer-card.blade.php
@@ -51,7 +51,7 @@ class="text-red-600 dark:text-red-400"
             @if ($this->uploadTypes === [])
                 <x-ui.text muted class="mt-4">{{ __('No document types yet. Add them on System, then Add-ons.') }}</x-ui.text>
             @else
-                <form wire:submit="upload" class="mt-4 grid gap-3 rounded-lg border border-zinc-200 p-4 sm:grid-cols-2 lg:grid-cols-3 dark:border-zinc-700">
+                <form wire:submit="saveDocument" class="mt-4 grid gap-3 rounded-lg border border-zinc-200 p-4 sm:grid-cols-2 lg:grid-cols-3 dark:border-zinc-700">
                     <x-ui.select
                         wire:model.live="uploadType"
                         :label="__('Document type')"
diff --git a/resources/views/livewire/customer-card/customer-card.php b/resources/views/livewire/customer-card/customer-card.php
index 6c71700..8deadcd 100644
--- a/resources/views/livewire/customer-card/customer-card.php
+++ b/resources/views/livewire/customer-card/customer-card.php
@@ -175,7 +175,7 @@ public function showNumber(int $id): void
     /**
      * Stores the file as the customer's document of the chosen type, replacing (hiding) one already there.
      */
-    public function upload(): void
+    public function saveDocument(): void
     {
         $this->authorize(Abilities::UPLOAD);
         abort_if($this->account->trashed(), 403);
diff --git a/tests/Feature/ActionNamesTest.php b/tests/Feature/ActionNamesTest.php
new file mode 100644
index 0000000..e840277
--- /dev/null
+++ b/tests/Feature/ActionNamesTest.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+| Livewire's browser side keeps some $wire names for itself (`upload` is its own file upload helper), so
+| wire:submit="upload" never reached the component's upload() method. The names come from the installed Livewire.
+*/
+it('names no button or form action after one of Livewire\'s own $wire helpers', function () {
+    $livewire = (string) file_get_contents(base_path('vendor/livewire/livewire/dist/livewire.esm.js'));
+    preg_match('/var aliases = \{(.*?)\};/s', $livewire, $block);
+    preg_match_all('/"(\w+)":/', $block[1] ?? '', $reserved);
+
+    $root = dirname(__DIR__, 2);
+    $actions = [];
+    $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator("{$root}/resources/views", FilesystemIterator::SKIP_DOTS));
+
+    foreach ($files as $file) {
+        preg_match_all('/wire:(?:click|submit)[\w.-]*="\s*([A-Za-z_]\w*)/', (string) file_get_contents($file->getPathname()), $matches);
+        $actions = [...$actions, ...$matches[1]];
+    }
+
+    expect($reserved[1])->toContain('upload')
+        ->and(array_values(array_intersect(array_unique($actions), $reserved[1])))->toBe([]);
+});
diff --git a/tests/Feature/CustomerCardTest.php b/tests/Feature/CustomerCardTest.php
index 5531b26..c431d97 100644
--- a/tests/Feature/CustomerCardTest.php
+++ b/tests/Feature/CustomerCardTest.php
@@ -75,9 +75,9 @@ function card(Account $account): Testable
 
     card($this->account)
         ->set('uploadType', (string) $photo->id)
-        ->set('uploadFile', UploadedFile::fake()->createWithContent('a.png', '<html></html>'))->call('upload')
+        ->set('uploadFile', UploadedFile::fake()->createWithContent('a.png', '<html></html>'))->call('saveDocument')
         ->assertHasErrors(['uploadFile'])
-        ->set('uploadFile', pngUpload('me.png'))->call('upload')->assertHasNoErrors()
+        ->set('uploadFile', pngUpload('me.png'))->call('saveDocument')->assertHasNoErrors()
         ->assertSet('uploadType', '')->assertSet('uploadFile', null);
 
     expect(Document::query()->where('document_type_id', $photo->id)->sole()->original_name)->toBe('me.png');
@@ -86,10 +86,10 @@ function card(Account $account): Testable
 it('needs the type and the file in the upload box', function () {
     $this->actingAs($this->admin);
 
-    card($this->account)->call('upload')
+    card($this->account)->call('saveDocument')
         ->assertHasErrors(['uploadType' => __('Choose the document type.'), 'uploadFile' => __('Choose the file.')]);
     card($this->account)->set('uploadType', (string) documentType('Old form', ['active' => false])->id)->set('uploadFile', pngUpload())
-        ->call('upload')->assertHasErrors(['uploadType']);
+        ->call('saveDocument')->assertHasErrors(['uploadType']);
 });
 
 it('edits the type and number, refusing a taken type', function () {
@@ -136,7 +136,7 @@ function card(Account $account): Testable
     $this->account->delete();
 
     card($this->account)->assertOk()->assertSee('xxxx xxxx 4821')->assertDontSee(__('Choose file'))
-        ->set('uploadType', (string) $photo->id)->set('uploadFile', pngUpload())->call('upload')->assertForbidden();
+        ->set('uploadType', (string) $photo->id)->set('uploadFile', pngUpload())->call('saveDocument')->assertForbidden();
 });
 
 it('downloads all current documents as one zip and logs it', function () {
@@ -165,7 +165,7 @@ function card(Account $account): Testable
     card($this->account)->assertSee(__(':type (replaces the current file)', ['type' => 'Aadhaar card']))
         ->set('uploadType', (string) $this->aadhaar->id)
         ->assertSeeHtml('wire:confirm="'.e(__('Replace the :type of :customer? The current file can be restored from Deleted documents.', ['type' => 'Aadhaar card', 'customer' => 'Ramesh Kumar'])).'"')
-        ->set('uploadFile', pngUpload('sharper.png'))->call('upload')->assertHasNoErrors();
+        ->set('uploadFile', pngUpload('sharper.png'))->call('saveDocument')->assertHasNoErrors();
 
     expect($this->document->fresh()->trashed())->toBeTrue()
         ->and(Document::query()->sole()->original_name)->toBe('sharper.png')
@@ -204,7 +204,7 @@ function card(Account $account): Testable
     $this->actingAs($this->admin);
     $photo = documentType('Customer photo');
 
-    card($this->account)->set('uploadType', (string) $photo->id)->set('uploadFile', 'documents/1/secret')->call('upload')->assertHasErrors(['uploadFile']);
+    card($this->account)->set('uploadType', (string) $photo->id)->set('uploadFile', 'documents/1/secret')->call('saveDocument')->assertHasErrors(['uploadFile']);
 });
 
 it('refuses Upload once the customer is deleted while the card is open', function () {
@@ -214,7 +214,7 @@ function card(Account $account): Testable
 
     $this->account->delete();
 
-    $card->set('uploadType', (string) $photo->id)->set('uploadFile', pngUpload())->call('upload')->assertForbidden();
+    $card->set('uploadType', (string) $photo->id)->set('uploadFile', pngUpload())->call('saveDocument')->assertForbidden();
     expect(Document::query()->where('document_type_id', $photo->id)->count())->toBe(0);
 });