diff --git a/app/Aggregates/MembershipAggregate.php b/app/Aggregates/MembershipAggregate.php
index 843a2f03..96e40fa2 100644
--- a/app/Aggregates/MembershipAggregate.php
+++ b/app/Aggregates/MembershipAggregate.php
@@ -47,7 +47,7 @@ public function __construct()
         $booted = [];
 
         foreach (class_uses_recursive($class) as $trait) {
-            $method = 'boot'.class_basename($trait);
+            $method = 'boot' . class_basename($trait);
 
             if (method_exists($class, $method) && ! in_array($method, $booted)) {
                 $this->$method();
@@ -234,6 +234,8 @@ public function deleteUserMembership($membership): static
 
         $this->recordThat(new UserMembershipDeleted($membership));
 
+        $this->handleUserMembershipDeleted($membership['id']);
+
         return $this;
     }
 
diff --git a/app/Aggregates/MembershipTraits/Cards.php b/app/Aggregates/MembershipTraits/Cards.php
index 040d5ee0..a16ec12a 100644
--- a/app/Aggregates/MembershipTraits/Cards.php
+++ b/app/Aggregates/MembershipTraits/Cards.php
@@ -26,7 +26,7 @@ trait Cards
 
     public Collection $cardsEverActivated;  // Cards that have ever been activated. Cards are not removed on deactivation.
 
-    public function bootCards()
+    public function bootCards(): void
     {
         $this->cardsOnAccount = collect();
         $this->cardsNeedingActivation = collect();
diff --git a/app/Aggregates/MembershipTraits/UserMembership.php b/app/Aggregates/MembershipTraits/UserMembership.php
index 9da87f76..4458e253 100644
--- a/app/Aggregates/MembershipTraits/UserMembership.php
+++ b/app/Aggregates/MembershipTraits/UserMembership.php
@@ -9,6 +9,12 @@
 trait UserMembership
 {
     public bool $activeFullMemberPlan = false;
+    public array $userMembershipIdToPlanId;
+
+    public function bootUserMembership(): void
+    {
+        $this->userMembershipIdToPlanId = [];
+    }
 
     public function handleUserMembership($userMembership): void
     {
@@ -17,6 +23,19 @@ public function handleUserMembership($userMembership): void
         }
     }
 
+    public function handleUserMembershipDeleted($userMembershipId): void
+    {
+        if (! array_key_exists($userMembershipId, $this->userMembershipIdToPlanId)) {
+            // This shouldn't happen, but we'd like to report the exception just in case so someone can investigate.
+            throw new \Exception("Did not find deleted user membership: $userMembershipId");
+        }
+
+        $planId = $this->userMembershipIdToPlanId[$userMembershipId];
+        if ($planId == \App\Models\UserMembership::MEMBERSHIP_FULL_MEMBER) {
+            $this->deactivateMembershipIfNeeded();
+        }
+    }
+
     protected function handleFullMemberPlan($userMembership): void
     {
         $currentStatus = $userMembership['status'];
@@ -47,6 +66,8 @@ protected function applyUserMembershipImported(UserMembershipImported $event): v
 
     protected function updateUserMembershipStatus($userMembership): void
     {
+        $this->userMembershipIdToPlanId[$userMembership['id']] = $userMembership['plan_id'];
+
         if ($userMembership['plan_id'] == \App\Models\UserMembership::MEMBERSHIP_FULL_MEMBER) {
             if ($userMembership['status'] == 'active') {
                 $this->activeFullMemberPlan = true;
diff --git a/tests/Unit/Aggregates/MembershipAggregate/ActiveMembershipTest.php b/tests/Unit/Aggregates/MembershipAggregate/ActiveMembershipTest.php
index 442e1f4f..5d6b66fb 100644
--- a/tests/Unit/Aggregates/MembershipAggregate/ActiveMembershipTest.php
+++ b/tests/Unit/Aggregates/MembershipAggregate/ActiveMembershipTest.php
@@ -10,6 +10,7 @@
 use App\StorableEvents\WooCommerce\CustomerCreated;
 use App\StorableEvents\WooCommerce\CustomerUpdated;
 use App\StorableEvents\WooCommerce\UserMembershipCreated;
+use App\StorableEvents\WooCommerce\UserMembershipDeleted;
 use App\StorableEvents\WooCommerce\UserMembershipUpdated;
 use Illuminate\Support\Facades\Event;
 use Spatie\EventSourcing\Facades\Projectionist;
@@ -185,6 +186,52 @@ public function user_membership_from_active_to_expired_deactivates_membership():
             ]);
     }
 
+    /** @test */
+    public function user_membership_deleted_deactivates_membership(): void
+    {
+        $customer = $this->customer();
+
+        $oldUserMembership = $this->userMembership()->plan(UserMembership::MEMBERSHIP_FULL_MEMBER)
+            ->status('active');
+        $deletedPayload = ['id' => $oldUserMembership->id];
+
+        MembershipAggregate::fakeCustomer($customer)
+            ->given([
+                new CustomerCreated($customer),
+                new UserMembershipCreated($oldUserMembership),
+                new MembershipActivated($customer->id),
+            ])
+            ->deleteUserMembership($deletedPayload)
+            ->assertRecorded([
+                new UserMembershipDeleted($deletedPayload),
+                new MembershipDeactivated($customer->id),
+            ]);
+    }
+
+    /** @test */
+    public function user_membership_deleted_does_not_deactivate_if_plan_is_not_membership_plan(): void
+    {
+        $customer = $this->customer();
+
+        $userMembershipMember = $this->userMembership()->id(5)->plan(UserMembership::MEMBERSHIP_FULL_MEMBER)
+            ->status('active');
+        $userMembership3DP = $this->userMembership()->id(6)->plan(UserMembership::MEMBERSHIP_3DP_USER)
+            ->status('active');
+        $deletedPayload = ['id' => $userMembership3DP->id];
+
+        MembershipAggregate::fakeCustomer($customer)
+            ->given([
+                new CustomerCreated($customer),
+                new UserMembershipCreated($userMembership3DP),
+                new UserMembershipCreated($userMembershipMember),
+                new MembershipActivated($customer->id),
+            ])
+            ->deleteUserMembership($deletedPayload)
+            ->assertRecorded([
+                new UserMembershipDeleted($deletedPayload),
+            ]);
+    }
+
     /** @test */
     public function user_membership_from_active_to_active_does_nothing(): void
     {