Has anyone had to deal with Alliance one?

Welcome to the Community :D I,personally, have not dealt with them, but here is a link discussing them at http://www.debtconsolidationcare.com/collection-agencies/leaving-message.html If you use the search feature at the top of your screen, you will find others who have dealt with them.

What type of debt are they trying to collect for?
How old is the debt, and what state do you live in?

Some of the CA are legit, while others try to collect debts from people that aren't theirs, inflated the amount, etc.

Feel free to ask questions, we are here to help!..Karen

Here is a link that gives much info about them. http://www.budhibbs.com/debtcollectorpages/alliance_one.htm
Hold your breath when you go there as they smell really bad. If they are harassing you send them a cease communication letter and a debt validation letter.