It should state the date on the paperwork you received. It should also give you the beneficary and a phone number you can call to get the status and the dates. I hope this helps. http://ForeclosureIQ.com
You can find out through tax records, but the quickest way is to have a realtor like myself, or a lender look it up. In addtion to foreclosure date, a lender can provide any other credit issues that may need to be addressed. As stated before, the foreclosure date is critical, as it sets the the foundation for your path BACK to HOME OWNERSHIP!
You should have received a notice of default letter from the bank. If not you can try to contact the local courthouse or check your local tax records. However it sometimes can take months for the local tax records to be updated with the transfer information.
You might also want to check with the lender that foreclosed on the home and ask them for more information. You can also ask them for any necessary paperwork you will need for tax filing purposes.