There are two ways that a customer can consent to email marketing through the theme:

  - [A newsletter sign-up form](#newsletter-sign-up-form)
  - [A checkbox input in the customer register form](#customer-registration-form-checkbox)

## Newsletter sign-up form

You can add a newsletter sign-up form to your theme with the Liquid [form tag](/docs/api/liquid/tags/form#form-customer) and accompanying `'customer'` parameter. Inside the form, you need to include an input with the following attributes:

<table>
  <thead>
    <tr>
      <th>Attribute</th>
      <th>Value</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><code>type</code></td>
      <td><code>email</code></td>
    </tr>
    <tr>
      <td><code>name</code></td>
      <td><code>contact[email]</code></td>
    </tr>
  </tbody>
</table>

For example:

```liquid

{% form 'customer' %}
  <div class="email">
    <label for="email">Email</label>
    <input type="email" name="contact[email]" />
  </div>

  <div class="submit">
    <input type="submit" value="Sign up" />
  </div>
{% endform %}

```

When a customer signs up through this form, a customer will be created with the entered email, and the `accepts_marketing` attribute of the associated [`customer` object](/docs/api/liquid/objects/customer) will be set to `true`.

> Tip:
> For another example of a newsletter sign-up form, you can refer to [Dawn's implementation](https://github.com/Shopify/dawn/blob/main/sections/footer.liquid).

## Customer registration form checkbox

Inside the [customer register form](/docs/storefronts/themes/architecture/templates/customers-register#the-customer-register-form), you can include a checkbox to allow customers to consent email marketing. This requires the following inputs to be placed inside the form:

<table>
  <thead>
    <tr>
      <th>Input</th>
      <th>type</th>
      <th>name</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Accepts marketing</td>
      <td><code>hidden</code></td>
      <td><code>customer[accepts_marketing]</code></td>
    </tr>
    <tr>
      <td>Accepts marketing</td>
      <td><code>checkbox</code></td>
      <td><code>customer[accepts_marketing]</code></td>
    </tr>
  </tbody>
</table>

For example:

```liquid

{% form 'create_customer' %}
  {{ form.errors | default_errors }}

  <div class="first-name">
    <label for="first-name">First name</label>
    <input type="text" name="customer[first_name]" />
  </div>

  <div class="last-name">
    <label for="last-name">Last name</label>
    <input type="text" name="customer[last_name]" />
  </div>

  <div class="email">
    <label for="email">Email</label>
    <input type="email" name="customer[email]" />
  </div>

  <div class="password">
    <label for="password">Password</label>
    <input type="password" name="customer[password]" />
  </div>

  <div class="accepts-marketing">
    <input type="hidden" name="customer[accepts_marketing]" value="false" />

    <input type="checkbox" name="customer[accepts_marketing]" />
    <label for="accepts-marketing">Subscribe to email marketing</label>
  </div>

  <div class="submit">
    <input type="submit" value="Create" />
  </div>
{% endform %}

```

> Tip:
> This solution requires a hidden input, as well as the checkbox input, as an unchecked box won't record a value when the form is submitted.