app/views/devise/invitations/new.html.erb
<h2><%= t "devise.invitations.new.header" %></h2>
<%= form_for resource, :as => resource_name, :url => invitation_path(resource_name), :html => {:method => :post} do |f| %>
<%= devise_error_messages! %>
<p><%= f.label :email %><br />
<%= f.text_field :email %></p>
<%= f.hidden_field :society_id, value: current_user.id %>
<p><%= f.submit t("devise.invitations.new.submit_button") %></p>
<% end %>