no se si funcionará, pero puedes probar con autocomplete=off
Código HTML:
<form action="demo_form.asp">
First name:<input type="text" name="fname" autocomplete="off"><br>
Last name: <input type="text" name="lname" autocomplete="off"><br>
E-mail: <input type="email" name="email" autocomplete="off"><br>
<input type="submit">
</form>