Mail triggering for the approvels

Hi all,

My requirement is to automate the manual process of approvals.

Now the manual process has a 5 levels of approvals. They are doing the signatures manually and now they want to automate it by doing with the e-signatures if the first level of authorization is done mail to be triggered for the second person and if second was done mail to be triggered to the third person and so on . this signature will be in a form.

Thanks in advance.

regards

reddy.