27. Can I add further attachments after submitting a petition? 

Further attachments can be added at a later stage to a submitted petition. Just log into your account, click on the submitted petition and add further attachments. You can verify the upload by checking your petition page (home page -> select petition from the list -> view), where all uploaded documents appear. You can upload further documents, but you cannot see their content nor can you delete them after the upload is complete.