diff --git a/src/app/modules/submission/encrypt-submission/__tests__/IncomingEncryptSubmission.class.spec.ts b/src/app/modules/submission/encrypt-submission/__tests__/IncomingEncryptSubmission.class.spec.ts
index d6de771af5..4944e62b3f 100644
--- a/src/app/modules/submission/encrypt-submission/__tests__/IncomingEncryptSubmission.class.spec.ts
+++ b/src/app/modules/submission/encrypt-submission/__tests__/IncomingEncryptSubmission.class.spec.ts
@@ -3,15 +3,23 @@ import { mocked } from 'ts-jest/utils'
 
 import {
   generateDefaultField,
+  generateProcessedSingleAnswerResponse,
   generateSingleAnswerResponse,
 } from '../../../../../../tests/unit/backend/helpers/generate-form-data'
+import * as LogicUtil from '../../../../../shared/util/logic'
 import {
   BasicField,
   IPopulatedEncryptedForm,
+  IPreventSubmitLogicSchema,
+  LogicType,
   ResponseMode,
 } from '../../../../../types'
 import { checkIsEncryptedEncoding } from '../../../../utils/encryption'
-import { ConflictError } from '../../submission.errors'
+import {
+  ConflictError,
+  ProcessingError,
+  ValidateFieldError,
+} from '../../submission.errors'
 import IncomingEncryptSubmission from '../IncomingEncryptSubmission.class'
 
 jest.mock('../../../../utils/encryption')
@@ -63,4 +71,95 @@ describe('IncomingEncryptSubmission', () => {
       new ConflictError('Some form fields are missing'),
     )
   })
+
+  it('should allow responses for encrypt mode hidden fields', async () => {
+    mockCheckIsEncryptedEncoding.mockReturnValueOnce(ok(true))
+    // Only check for mobile and email fields, since the other fields are
+    // e2e encrypted from the browser.
+    const mobileField = generateDefaultField(BasicField.Mobile)
+    const emailField = generateDefaultField(BasicField.Email)
+    // Add answers to both mobile and email fields
+    const mobileResponse = generateSingleAnswerResponse(
+      mobileField,
+      '+6587654321',
+    )
+
+    const emailResponse = generateSingleAnswerResponse(
+      emailField,
+      'test@example.com',
+    )
+
+    const mobileProcessedResponse = generateProcessedSingleAnswerResponse(
+      mobileField,
+      '+6587654321',
+    )
+    mobileProcessedResponse.isVisible = false
+
+    const emailProcessedResponse = generateProcessedSingleAnswerResponse(
+      emailField,
+      'test@example.com',
+    )
+    emailProcessedResponse.isVisible = false
+
+    const responses = [mobileResponse, emailResponse]
+
+    const result = IncomingEncryptSubmission.init(
+      {
+        responseMode: ResponseMode.Encrypt,
+        form_fields: [mobileField, emailField],
+      } as unknown as IPopulatedEncryptedForm,
+      responses,
+      '',
+    )
+
+    expect(result.isOk()).toEqual(true)
+    expect(result._unsafeUnwrap().responses).toEqual(responses)
+  })
+
+  it('should return error when any responses are not valid for encrypted form submission', async () => {
+    mockCheckIsEncryptedEncoding.mockReturnValueOnce(ok(true))
+    // Only mobile and email fields are parsed, since the other fields are
+    // e2e encrypted from the browser.
+    const mobileField = generateDefaultField(BasicField.Mobile)
+    const mobileResponse = generateSingleAnswerResponse(mobileField, 'invalid')
+
+    const result = IncomingEncryptSubmission.init(
+      {
+        responseMode: ResponseMode.Encrypt,
+        form_fields: [mobileField],
+      } as unknown as IPopulatedEncryptedForm,
+      [mobileResponse],
+      '',
+    )
+
+    expect(result.isErr()).toEqual(true)
+    expect(result._unsafeUnwrapErr()).toEqual([
+      new ValidateFieldError('Invalid answer submitted'),
+    ])
+  })
+
+  it('should return error when encrypted form submission is prevented by logic', async () => {
+    mockCheckIsEncryptedEncoding.mockReturnValueOnce(ok(true))
+    // Mock logic util to return non-empty to check if error is thrown
+    jest.spyOn(LogicUtil, 'getLogicUnitPreventingSubmit').mockReturnValueOnce({
+      preventSubmitMessage: 'mock prevent submit',
+      conditions: [],
+      logicType: LogicType.PreventSubmit,
+      _id: 'some id',
+    } as unknown as IPreventSubmitLogicSchema)
+
+    const result = IncomingEncryptSubmission.init(
+      {
+        responseMode: ResponseMode.Encrypt,
+        form_fields: [],
+      } as unknown as IPopulatedEncryptedForm,
+      [],
+      '',
+    )
+
+    expect(result.isErr()).toEqual(true)
+    expect(result._unsafeUnwrapErr()).toEqual(
+      new ProcessingError('Submission prevented by form logic'),
+    )
+  })
 })