diff --git a/cypress/deployed-and-local/integration/authentication/petitioner-account-creation.cy.ts b/cypress/deployed-and-local/integration/authentication/petitioner-account-creation.cy.ts
index 23ebe8ce469..b94df3a7e23 100644
--- a/cypress/deployed-and-local/integration/authentication/petitioner-account-creation.cy.ts
+++ b/cypress/deployed-and-local/integration/authentication/petitioner-account-creation.cy.ts
@@ -87,11 +87,37 @@ describe('Petitioner Account Creation', () => {
   });
 
   describe('Create Petitioner Account and login', () => {
-    const TEST_EMAIL = `cypress_test_account+success_${GUID}@example.com`;
     const TEST_NAME = 'Cypress Test';
     const TEST_PASSWORD = generatePassword(VALID_PASSWORD_CONFIG);
 
-    it('should create an account and verify it using the verification link, then login and create an eletronic case', () => {
+    it('should prevent multiple submissions', () => {
+      const TEST_EMAIL = `cypress_test_account+no_multiple_submissions_${GUID}@example.com`;
+      cy.visit('/create-account/petitioner');
+      cy.get('[data-testid="petitioner-account-creation-email"]').type(
+        TEST_EMAIL,
+      );
+      cy.get('[data-testid="petitioner-account-creation-name"]').type(
+        TEST_NAME,
+      );
+      cy.get('[data-testid="petitioner-account-creation-password"]').type(
+        TEST_PASSWORD,
+      );
+      cy.get(
+        '[data-testid="petitioner-account-creation-confirm-password"]',
+      ).type(TEST_PASSWORD);
+      cy.intercept('POST', '/auth/account/create').as('accountCreationRequest');
+
+      // eslint-disable-next-line cypress/unsafe-to-chain-command
+      cy.get('[data-testid="petitioner-account-creation-submit-button"]')
+        .click({ force: true })
+        .click({ force: true });
+
+      cy.wait('@accountCreationRequest');
+      cy.get('@accountCreationRequest.all').should('have.length', 1);
+    });
+
+    it('should create an account and verify it using the verification link, then login and create an electronic case', () => {
+      const TEST_EMAIL = `cypress_test_account+success_${GUID}@example.com`;
       createAPetitioner({
         email: TEST_EMAIL,
         name: TEST_NAME,
diff --git a/web-api/src/business/useCases/auth/signUpUserInteractor.ts b/web-api/src/business/useCases/auth/signUpUserInteractor.ts
index 87091c8894b..ab22dda09b1 100644
--- a/web-api/src/business/useCases/auth/signUpUserInteractor.ts
+++ b/web-api/src/business/useCases/auth/signUpUserInteractor.ts
@@ -28,6 +28,11 @@ export const signUpUserInteractor = async (
       email: user.email,
     });
 
+  // Note that this check can fail to catch two (nearly) simultaneous requests,
+  // and Cognito can therefore create accounts with the same email.
+  // (See https://stackoverflow.com/questions/50730759/user-pool-allows-two-users-with-same-email-despite-configuration)
+  // On the frontend, we can prevent multiple submissions; if we wanted to enforce non-duplicates on the backend,
+  // we would probably need to run an asynchronous task to delete duplicate records.
   if (existingAccount) {
     const accountUnconfirmed =
       existingAccount.accountStatus === UserStatusType.UNCONFIRMED;
diff --git a/web-client/src/views/CreatePetitionerAccount/CreatePetitionerAccountForm.tsx b/web-client/src/views/CreatePetitionerAccount/CreatePetitionerAccountForm.tsx
index c9971de0789..f3b47a340ab 100644
--- a/web-client/src/views/CreatePetitionerAccount/CreatePetitionerAccountForm.tsx
+++ b/web-client/src/views/CreatePetitionerAccount/CreatePetitionerAccountForm.tsx
@@ -1,11 +1,16 @@
 import { Button } from '@web-client/ustc-ui/Button/Button';
 import { RequirementsText } from '@web-client/views/CreatePetitionerAccount/RequirementsText';
 import { connect } from '@web-client/presenter/shared.cerebral';
+import { debounce } from 'lodash';
 import { sequences, state } from '@web-client/presenter/app.cerebral';
-import React, { useState } from 'react';
+import React, { useEffect, useState } from 'react';
+
+const DEBOUNCE_TIME_MS = 500;
 
 export const CreatePetitionerAccountForm = connect(
   {
+    alertError: state.alertError,
+    alertWarning: state.alertWarning,
     confirmPassword: state.form.confirmPassword,
     createAccountHelper: state.createAccountHelper,
     navigateToLoginSequence: sequences.navigateToLoginSequence,
@@ -18,6 +23,8 @@ export const CreatePetitionerAccountForm = connect(
     updateFormValueSequence: sequences.updateFormValueSequence,
   },
   ({
+    alertError,
+    alertWarning,
     confirmPassword,
     createAccountHelper,
     navigateToLoginSequence,
@@ -30,6 +37,18 @@ export const CreatePetitionerAccountForm = connect(
   }) => {
     const [inFocusEmail, setInFocusEmail] = useState(true);
     const [inFocusName, setInFocusName] = useState(true);
+    const [submitDisabled, setSubmitDisabled] = useState(false);
+
+    // Re-enabled submit button if submission was unsuccessful
+    useEffect(() => {
+      if (alertError || alertWarning) {
+        setSubmitDisabled(false);
+      }
+    }, [alertError, alertWarning]);
+
+    const submitFunction = debounce(() => {
+      submitCreatePetitionerAccountFormSequence();
+    }, DEBOUNCE_TIME_MS);
 
     return (
       <>
@@ -42,7 +61,8 @@ export const CreatePetitionerAccountForm = connect(
             <form
               onSubmit={e => {
                 e.preventDefault();
-                submitCreatePetitionerAccountFormSequence();
+                setSubmitDisabled(true);
+                submitFunction();
               }}
             >
               <label className="usa-label" htmlFor="email">
@@ -205,7 +225,7 @@ export const CreatePetitionerAccountForm = connect(
               <Button
                 className="usa-button margin-top-2"
                 data-testid="petitioner-account-creation-submit-button"
-                disabled={!createAccountHelper.formIsValid}
+                disabled={!createAccountHelper.formIsValid || submitDisabled}
                 id="submit-button"
               >
                 Continue