What you all encountered is a Work At Home payment processing scam! you are hired to accept payments from so called comapnies that owe the one that hired you money. Problem is that you are being sent counterfeit or altered money orders and checks to cash for them.
This is a money laundering scam and they put you right in the middle of it unsuspectingly. IF you have given them ANY identification Drivers licens, social security number , copy of passport you are in immediate danger of Identity Theft!. You need to immediately do the following things:
1. Fraud Flag all 3 credit bureau reports, obtain your free copy for this year and audit it for anything that is not yours. Dispute the items that are not yours and demand signature proof for the debts.
2. Report this to whoever issued the id that you sent copies of. For drivers license some states will allow you to change your license and have a new number issued.
3. Change any passwords for your online bnaking accounts, credit card accounts, etc at least 1x per week , I recommend 2x per week for at least the first few months.
4. You need to scrub your computer - use a trojan detector, anti virus, anti spyware programs as well as invoke a firewall.
http://www.zonelabs.com - free firewall called zone alarm
http://www.grisoft.com - free AVG antivirus
spy bot search and destroy is a good anti spyware as is microsoft anti spyware and again both are free.
There is a good registry cleaner called CCleaner and again it is also free
Finally alert your bank to the fact that your identity was stolen and that you need to change account numbers by closing the old and opening a new. This will only work if you do not owe your bank at present.
Any credit card information they may have, close that account and have a new card issued immediately.
Hope this helps