Hi,

You can try this code

<record id="view_form_id" model="ir.ui.view">
  <field name="name">view name</field>
  <field name="model">my.model</field>
  <field name="priority" eval="10"/>
  <field name="arch" type="xml">
     <form string="..." duplicate="0">
     ...
     </form>
  </field>
</record>

or by extending an existing view:

<field name="arch" type="xml">
    <xpath expr="//form" position="attributes">
        <attribute name="duplicate">0</attribute>
    </xpath>
</field>

for Delete option:

1. In the tree/form view of the contact add the delete attribute. 

like <tree delete="0"> . for the form <form delete="0">

2. remove the user access rights of users for delete the contact from the menu "Access Rights"

3. override fields_view_get, you can also remove the option for the "delete" from the "Action Drop Down"

4. override the unlink. using this you have the option "delete" in the "Action" dropdown. but using the override unlink method you can raise an error, so the user cannot delete the contact.

Hope it helps