diff --git a/CHANGELOG.md b/CHANGELOG.md
index ebacc35970..1a00ad99f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@
 
 ## 4.42.0 (2024-03-12)
 
+* PayPal
+  * Add optional property `PayPalVaultRequest.setUserAuthenticationEmail()`
 * BraintreeCore
   * Send `paypal_context_id` in `analytics_event` to PayPal's analytics service (FPTI) when available
 * Venmo
diff --git a/PayPal/src/main/java/com/braintreepayments/api/PayPalRequest.java b/PayPal/src/main/java/com/braintreepayments/api/PayPalRequest.java
index e48b25164d..d2576a5a41 100644
--- a/PayPal/src/main/java/com/braintreepayments/api/PayPalRequest.java
+++ b/PayPal/src/main/java/com/braintreepayments/api/PayPalRequest.java
@@ -26,6 +26,7 @@ public abstract class PayPalRequest implements Parcelable {
     static final String REQUEST_BILLING_AGREEMENT_KEY = "request_billing_agreement";
     static final String BILLING_AGREEMENT_DETAILS_KEY = "billing_agreement_details";
     static final String DESCRIPTION_KEY = "description";
+    static final String PAYER_EMAIL_KEY = "payer_email";
     static final String AUTHORIZATION_FINGERPRINT_KEY = "authorization_fingerprint";
     static final String TOKENIZATION_KEY = "client_key";
     static final String RETURN_URL_KEY = "return_url";
diff --git a/PayPal/src/main/java/com/braintreepayments/api/PayPalVaultRequest.java b/PayPal/src/main/java/com/braintreepayments/api/PayPalVaultRequest.java
index 83c4b373cf..643678d0c4 100644
--- a/PayPal/src/main/java/com/braintreepayments/api/PayPalVaultRequest.java
+++ b/PayPal/src/main/java/com/braintreepayments/api/PayPalVaultRequest.java
@@ -4,6 +4,8 @@
 import android.os.Parcelable;
 import android.text.TextUtils;
 
+import androidx.annotation.Nullable;
+
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -14,6 +16,8 @@ public class PayPalVaultRequest extends PayPalRequest implements Parcelable {
 
     private boolean shouldOfferCredit;
 
+    private String userAuthenticationEmail;
+
     public PayPalVaultRequest() {
     }
 
@@ -30,6 +34,21 @@ public boolean getShouldOfferCredit() {
         return shouldOfferCredit;
     }
 
+    /**
+     * Optional: User email to initiate a quicker authentication flow in cases where the user has a
+     * PayPal Account with the same email.
+     *
+     * @param userAuthenticationEmail - email address of the payer
+     */
+    public void setUserAuthenticationEmail(@Nullable String userAuthenticationEmail) {
+        this.userAuthenticationEmail = userAuthenticationEmail;
+    }
+
+    @Nullable
+    public String getUserAuthenticationEmail() {
+        return this.userAuthenticationEmail;
+    }
+
     String createRequestBody(Configuration configuration, Authorization authorization, String successUrl, String cancelUrl) throws JSONException {
         JSONObject parameters = new JSONObject()
                 .put(RETURN_URL_KEY, successUrl)
@@ -47,6 +66,8 @@ String createRequestBody(Configuration configuration, Authorization authorizatio
             parameters.put(DESCRIPTION_KEY, billingAgreementDescription);
         }
 
+        parameters.putOpt(PAYER_EMAIL_KEY, userAuthenticationEmail);
+
         JSONObject experienceProfile = new JSONObject();
         experienceProfile.put(NO_SHIPPING_KEY, !isShippingAddressRequired());
         experienceProfile.put(LANDING_PAGE_TYPE_KEY, getLandingPageType());
diff --git a/PayPal/src/test/java/com/braintreepayments/api/PayPalVaultRequestUnitTest.java b/PayPal/src/test/java/com/braintreepayments/api/PayPalVaultRequestUnitTest.java
index b4d07c7e71..af852b66cc 100644
--- a/PayPal/src/test/java/com/braintreepayments/api/PayPalVaultRequestUnitTest.java
+++ b/PayPal/src/test/java/com/braintreepayments/api/PayPalVaultRequestUnitTest.java
@@ -1,9 +1,12 @@
 package com.braintreepayments.api;
 
+import android.content.pm.Signature;
 import android.os.Parcel;
 
+import org.json.JSONException;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mockito;
 import org.robolectric.RobolectricTestRunner;
 
 import java.util.ArrayList;
@@ -12,6 +15,7 @@
 import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
 
 @RunWith(RobolectricTestRunner.class)
 public class PayPalVaultRequestUnitTest {
@@ -80,12 +84,12 @@ public void parcelsCorrectly() {
 
         assertEquals("en-US", result.getLocaleCode());
         assertEquals("Billing Agreement Description",
-                result.getBillingAgreementDescription());
+            result.getBillingAgreementDescription());
         assertTrue(result.getShouldOfferCredit());
         assertTrue(result.isShippingAddressRequired());
         assertTrue(result.isShippingAddressEditable());
         assertEquals("Postal Address", result.getShippingAddressOverride()
-                .getRecipientName());
+            .getRecipientName());
         assertEquals(PayPalRequest.LANDING_PAGE_TYPE_LOGIN, result.getLandingPageType());
         assertEquals("Display Name", result.getDisplayName());
         assertEquals("123-correlation", result.getRiskCorrelationId());
@@ -93,4 +97,20 @@ public void parcelsCorrectly() {
         assertEquals(1, result.getLineItems().size());
         assertEquals("An Item", result.getLineItems().get(0).getName());
     }
+
+    @Test
+    public void createRequestBody_sets_userAuthenticationEmail_when_not_null() throws JSONException {
+        String payerEmail = "payer_email@example.com";
+        PayPalVaultRequest request = new PayPalVaultRequest();
+
+        request.setUserAuthenticationEmail(payerEmail);
+        String requestBody = request.createRequestBody(
+            mock(Configuration.class),
+            mock(Authorization.class),
+            "success_url",
+            "cancel_url"
+        );
+
+        assertTrue(requestBody.contains("\"payer_email\":" + "\"" + payerEmail + "\""));
+    }
 }