Tulia relies on the source of the posting to update the data. That could be a brokerage feed, agent feed, or feed from another wesite such as listhub.com or homesandland.com. So the accuracy of data is really dependant on the dilligence of the feed source. The most accurate way to confirm a status would be to have a Realtor who is a member of the MLS system where the property is located confirm the status for you. The MLS is always the original source for this data. Once it is sold tax records will reflect it. This is a good website to look that up: www.NJACTB.org
Hope that helps.