ACR- is the abbreviation for accepting the condition of the property when sold. In the city of Detroit ACR's are required any time a residential property under 4 units is sold and resold and such much be agreed to prior to closing on such a property otherwise the property will not close. As a buyer you are often asked to "sign off on ACR" which means that you have to get a copy of the inspection report ordered by the Seller(which in cases of buying foreclosures and As Is properties, buyer is usually required to pay for it), take it down to the city county building yourself with proper ID, and there you get a notarized ACR that you must bring with you to closing. Only originals not copies will be acceptable at closing. Now the ACR means you are accepting the property AS IS in the sale and AGREE that if any issues are cited in the inspection you agree to get them resolved. When the ACR is cited in listing descriptions it must be addressed by closing or a deal can and will fall thru. It is important to check the municipalities that require such inspections ahead of time so that issue is not a holding block to the closing.