diff --git a/apps/api-rust/tests/acquisition.rs b/apps/api-rust/tests/acquisition.rs
index 866d07a06..c33219a77 100644
--- a/apps/api-rust/tests/acquisition.rs
+++ b/apps/api-rust/tests/acquisition.rs
@@ -728,3 +728,126 @@ async fn postgres_registration_respects_visit_time_boundaries() {
         fixture.cleanup().await;
     }
 }
+
+#[tokio::test]
+#[ignore = "requires isolated PostgreSQL via LMM_TEST_DATABASE_URL"]
+async fn postgres_visit_consent_and_owner_boundaries_are_atomic() {
+    let fixture = PgFixture::new().await;
+    let visitor = "f".repeat(64);
+
+    let missing_consent = fixture
+        .store
+        .observe(
+            &visitor,
+            7,
+            &input(json!({
+                "consent":true,
+                "consent_version":2,
+                "nonce":"88888888888888888888888888888888",
+                "landing":"/guide",
+                "source":"documentation"
+            })),
+            &["api.lmm.best"],
+        )
+        .await;
+    assert!(matches!(missing_consent, Err(Error::Invalid(_))));
+    let empty: (i64, i64) = sqlx::query_as(
+        "SELECT (SELECT COUNT(*) FROM acquisition_visitors),\
+                (SELECT COUNT(*) FROM acquisition_visits)",
+    )
+    .fetch_one(&fixture.pg)
+    .await
+    .unwrap();
+    assert_eq!(
+        empty,
+        (0, 0),
+        "rejected consent must not persist partial rows"
+    );
+
+    let legacy = fixture
+        .store
+        .observe(
+            &visitor,
+            7,
+            &input(json!({
+                "consent":true,
+                "consent_version":1,
+                "nonce":"99999999999999999999999999999999",
+                "landing":"/guide",
+                "source":"documentation"
+            })),
+            &["api.lmm.best"],
+        )
+        .await
+        .unwrap();
+    assert_eq!(legacy.consent_version, 1);
+
+    sqlx::query("INSERT INTO users VALUES(8,1700000000,NULL)")
+        .execute(&fixture.pg)
+        .await
+        .unwrap();
+    fixture.store.grant(8).await.unwrap();
+    let foreign_owner = fixture
+        .store
+        .observe(
+            &visitor,
+            8,
+            &input(json!({
+                "consent":true,
+                "consent_version":2,
+                "nonce":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+                "landing":"/pricing",
+                "source":"community"
+            })),
+            &["api.lmm.best"],
+        )
+        .await;
+    assert!(matches!(foreign_owner, Err(Error::Invalid(_))));
+
+    let state: (i64, i64, i64) = sqlx::query_as(
+        "SELECT (SELECT user_id FROM acquisition_visitors WHERE id=$1),\
+                (SELECT COUNT(*) FROM acquisition_visits WHERE visitor_id=$1),\
+                (SELECT COUNT(*) FROM acquisition_visits \
+                    WHERE visitor_id=$1 AND nonce='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa')",
+    )
+    .bind(&visitor)
+    .fetch_one(&fixture.pg)
+    .await
+    .unwrap();
+    assert_eq!(
+        state,
+        (7, 1, 0),
+        "owner conflict must roll back every write"
+    );
+
+    fixture.store.grant(7).await.unwrap();
+    let upgraded = fixture
+        .store
+        .observe(
+            &visitor,
+            7,
+            &input(json!({
+                "consent":true,
+                "consent_version":2,
+                "nonce":"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
+                "landing":"/pricing",
+                "source":"community"
+            })),
+            &["api.lmm.best"],
+        )
+        .await
+        .unwrap();
+    assert_eq!(upgraded.consent_version, 2);
+    let final_state: (i64, i64, bool, i64) = sqlx::query_as(
+        "SELECT (SELECT user_id FROM acquisition_visitors WHERE id=$1),\
+                (SELECT COUNT(*) FROM acquisition_visits WHERE visitor_id=$1),\
+                (SELECT allowed FROM acquisition_consents WHERE user_id=7),\
+                (SELECT version FROM acquisition_consents WHERE user_id=7)",
+    )
+    .bind(&visitor)
+    .fetch_one(&fixture.pg)
+    .await
+    .unwrap();
+    assert_eq!(final_state, (7, 2, true, 2));
+    fixture.cleanup().await;
+}
diff --git a/apps/api-rust/tests/scripts/check-real-integration-gates.sh b/apps/api-rust/tests/scripts/check-real-integration-gates.sh
index 7743b1f10..c3b066a5a 100644
--- a/apps/api-rust/tests/scripts/check-real-integration-gates.sh
+++ b/apps/api-rust/tests/scripts/check-real-integration-gates.sh
@@ -20,7 +20,7 @@ declare -A requirements=(
   [scripts.rs]='repository_options_commit_refresh_runtime_invalidate_cache_and_redact_audit|LMM_TEST_DATABASE_URL|LMM_AUTH_TEST_VALKEY_URL'
   [ai_directory.rs]='postgres_cache_and_audit_failures_do_not_reverse_committed_wallet_changes,postgres_create_replay_quote_changes_and_concurrency_charge_once,postgres_hide_refunds_once_and_wallet_failure_rolls_back_visibility,postgres_public_private_pagination_expiry_and_http_contract|LMM_TEST_DATABASE_URL|LMM_AUTH_TEST_VALKEY_URL'
   [token_queries.rs]='configured_token_prices_match_current_go_reference_live_maps_and_limits,persisted_usage_is_exact_token_scoped_utc_and_never_changes_credentials,quota_query_auth_checks_exact_key_expiry_owner_oauth_and_ip_without_status_writes,quota_query_limiter_is_shared_per_owner_across_keys_and_instances,token_pricing_checks_permissions_before_query_validation_and_never_mutates_key,token_pricing_uses_shared_credited_trust_facts_and_excludes_internal_credits|LMM_TEST_DATABASE_URL|LMM_AUTH_TEST_VALKEY_URL'
-  [acquisition.rs]='postgres_consent_visit_report_and_withdrawal_round_trip,postgres_link_policy_and_lookback_contracts_are_durable,postgres_registration_cannot_override_explicit_consent_denial,postgres_registration_keeps_first_touch_and_selects_last_external_visit,postgres_registration_respects_visit_time_boundaries|LMM_TEST_DATABASE_URL|'
+  [acquisition.rs]='postgres_consent_visit_report_and_withdrawal_round_trip,postgres_link_policy_and_lookback_contracts_are_durable,postgres_registration_cannot_override_explicit_consent_denial,postgres_registration_keeps_first_touch_and_selects_last_external_visit,postgres_registration_respects_visit_time_boundaries,postgres_visit_consent_and_owner_boundaries_are_atomic|LMM_TEST_DATABASE_URL|'
 )
 
 total_ignored=0
diff --git a/apps/api-rust/tests/scripts/run-real-integration-gates.sh b/apps/api-rust/tests/scripts/run-real-integration-gates.sh
index 42b4a6008..a624c85c4 100644
--- a/apps/api-rust/tests/scripts/run-real-integration-gates.sh
+++ b/apps/api-rust/tests/scripts/run-real-integration-gates.sh
@@ -193,8 +193,8 @@ run_token_queries() (
 
 run_acquisition() {
   require_loopback_url LMM_TEST_DATABASE_URL
-  require_api_ignored_test_count acquisition 5
-  run_counted_api_integration_tests acquisition 5
+  require_api_ignored_test_count acquisition 6
+  run_counted_api_integration_tests acquisition 6
 }
 
 run_shared_trust() {