diff --git a/src/main/java/org/opentripplanner/middleware/controllers/api/OtpUserController.java b/src/main/java/org/opentripplanner/middleware/controllers/api/OtpUserController.java
index 5d29fdccf..ac279122c 100644
--- a/src/main/java/org/opentripplanner/middleware/controllers/api/OtpUserController.java
+++ b/src/main/java/org/opentripplanner/middleware/controllers/api/OtpUserController.java
@@ -16,6 +16,7 @@
 import spark.Request;
 import spark.Response;
 
+import java.util.Date;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -116,6 +117,7 @@ public VerificationResult sendVerificationText(Request req, Response res) {
         if (verification.getStatus().equals("pending")) {
             otpUser.phoneNumber = phoneNumber;
             otpUser.isPhoneNumberVerified = false;
+            otpUser.smsConsentDate = new Date();
             otpUser.notificationChannel.add(OtpUser.Notification.SMS);
             Persistence.otpUsers.replace(otpUser.id, otpUser);
         }
diff --git a/src/main/java/org/opentripplanner/middleware/models/OtpUser.java b/src/main/java/org/opentripplanner/middleware/models/OtpUser.java
index 7fd236861..bf0700aef 100644
--- a/src/main/java/org/opentripplanner/middleware/models/OtpUser.java
+++ b/src/main/java/org/opentripplanner/middleware/models/OtpUser.java
@@ -47,6 +47,14 @@ public enum Notification {
      */
     public String phoneNumber;
 
+    /**
+     * The date when consent was given by user to receive SMS messages, as required by Twilio,
+     * see https://www.twilio.com/docs/verify/sms#consent-and-opt-in-policy.
+     * If the user starts the phone verification process, this field is populated
+     * just before the verification code is sent.
+     */
+    public Date smsConsentDate;
+
     /**
      * The user's preferred locale, in language tag format
      * e.g. 'en-US', 'fr-FR', 'es-ES', 'zh-CN', etc.
diff --git a/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java b/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
index 261adced1..f622c23c9 100644
--- a/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
+++ b/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
@@ -13,6 +13,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.util.Date;
 
 import static org.junit.jupiter.api.Assumptions.assumeTrue;
 import static org.opentripplanner.middleware.testutils.PersistenceTestUtils.createUser;
@@ -94,12 +95,17 @@ public void canSendSmsNotification() {
      */
     @Test
     public void canSendTwilioVerificationText() {
+        Assertions.assertNull(user.smsConsentDate);
+        Date beforeVerificationDate = new Date();
         Verification verification = NotificationUtils.sendVerificationText(
             // Note: phone number is configured in setup method above.
             user.phoneNumber
         );
         LOG.info("Verification status: {}", verification.getStatus());
         Assertions.assertNotNull(verification.getSid());
+        Date afterVerificationDate = new Date();
+        Assertions.assertTrue(user.smsConsentDate.getTime() >= beforeVerificationDate.getTime());
+        Assertions.assertTrue(user.smsConsentDate.getTime() <= afterVerificationDate.getTime());
     }
 
     /**