Go to your local finanical institution. There are over 700 banks, financial institutions, etc that particpate in one of the three (3) medallian programs that the SEC requires. Usually the service is free for those with a relationship with the bank. Remember they are financially guarentee'ing your signature!
What does it mean to "financially" guarantee a signature? Is the banker required to view any financial documents other than those relating to accounts with their own institution?