diff --git a/src/main/java/com/stripe/mpp/methods/stripe/StripeApi.java b/src/main/java/com/stripe/mpp/methods/stripe/StripeApi.java
index bff758a..31f4eac 100644
--- a/src/main/java/com/stripe/mpp/methods/stripe/StripeApi.java
+++ b/src/main/java/com/stripe/mpp/methods/stripe/StripeApi.java
@@ -20,14 +20,21 @@ class StripeApi {
     static final class Result {
         private final String id;
         private final String status;
+        private final boolean idempotentReplayed;
 
         Result(String id, String status) {
+            this(id, status, false);
+        }
+
+        Result(String id, String status, boolean idempotentReplayed) {
             this.id = id;
             this.status = status;
+            this.idempotentReplayed = idempotentReplayed;
         }
 
         String id() { return id; }
         String status() { return status; }
+        boolean idempotentReplayed() { return idempotentReplayed; }
 
         @Override
         public boolean equals(Object o) {
@@ -35,17 +42,19 @@ public boolean equals(Object o) {
             if (!(o instanceof Result)) return false;
             Result result = (Result) o;
             return Objects.equals(id, result.id)
-                && Objects.equals(status, result.status);
+                && Objects.equals(status, result.status)
+                && idempotentReplayed == result.idempotentReplayed;
         }
 
         @Override
         public int hashCode() {
-            return Objects.hash(id, status);
+            return Objects.hash(id, status, idempotentReplayed);
         }
 
         @Override
         public String toString() {
-            return "Result[id=" + id + ", status=" + status + "]";
+            return "Result[id=" + id + ", status=" + status
+                + ", idempotentReplayed=" + idempotentReplayed + "]";
         }
     }
 
@@ -77,7 +86,16 @@ Result createAndConfirm(
                 .build();
 
             PaymentIntent pi = client.paymentIntents().create(builder.build(), options);
-            return new Result(pi.getId(), pi.getStatus());
+
+            boolean idempotentReplayed = false;
+            if (pi.getLastResponse() != null) {
+                idempotentReplayed = pi.getLastResponse().headers()
+                    .firstValue("Idempotent-Replayed")
+                    .map(Boolean::parseBoolean)
+                    .orElse(false);
+            }
+
+            return new Result(pi.getId(), pi.getStatus(), idempotentReplayed);
 
         } catch (StripeException e) {
             throw new VerificationFailedException(e.getMessage());
diff --git a/src/main/java/com/stripe/mpp/methods/stripe/StripeChargeIntent.java b/src/main/java/com/stripe/mpp/methods/stripe/StripeChargeIntent.java
index d51f00a..0c73dd0 100644
--- a/src/main/java/com/stripe/mpp/methods/stripe/StripeChargeIntent.java
+++ b/src/main/java/com/stripe/mpp/methods/stripe/StripeChargeIntent.java
@@ -103,6 +103,10 @@ public Receipt verify(Credential credential, Map<String, Object> request) {
         StripeApi.Result result = stripeApi.createAndConfirm(
             secretKey, amountMinorUnits, currency, spt, paymentMethodTypes, metadata, challengeId);
 
+        if (result.idempotentReplayed()) {
+            throw new VerificationFailedException(
+                "PaymentIntent " + result.id() + " was an idempotent replay, not a fresh charge");
+        }
         if ("requires_action".equals(result.status())) {
             throw new com.stripe.mpp.error.PaymentActionRequiredException(
                 "PaymentIntent " + result.id() + " requires action");
diff --git a/src/test/java/com/stripe/mpp/methods/stripe/StripeChargeIntentTest.java b/src/test/java/com/stripe/mpp/methods/stripe/StripeChargeIntentTest.java
index 29f6a00..cf4bce8 100644
--- a/src/test/java/com/stripe/mpp/methods/stripe/StripeChargeIntentTest.java
+++ b/src/test/java/com/stripe/mpp/methods/stripe/StripeChargeIntentTest.java
@@ -97,6 +97,21 @@ void successfulChargeReturnsReceipt() {
         assertThat(receipt.externalId()).isNull();
     }
 
+    @Test
+    void idempotentReplayedSucceededChargeIsRejected() {
+        // Regression test for AGR-2026-035: Stripe reporting a succeeded
+        // PaymentIntent whose creation was an idempotent replay (i.e. the
+        // charge already happened for an earlier challenge/SPT pair) must
+        // not be accepted as a fresh successful verification.
+        StubStripeApi api = new StubStripeApi(
+            new StripeApi.Result("pi_replay123", "succeeded", true));
+
+        assertThatThrownBy(() -> intent(api).verify(credential("spt_xxx"), REQUEST))
+            .isInstanceOf(VerificationFailedException.class)
+            .hasMessageContaining("pi_replay123")
+            .hasMessageContaining("replay");
+    }
+
     @Test
     void externalIdIncludedInReceipt() {
         StubStripeApi api = new StubStripeApi(new StripeApi.Result("pi_abc123", "succeeded"));