MLS's can update the data feeds they send to Trulia at any time and we process these feeds updates every 24 hours in the evenings. Keep in mind however that we receive listing information from many other sources as well. To help us ensure that our data is accurate and up-to-date we ask that you alert us when you do encounter listings for sale that have already been sold. This can be done easily on the property details page on our site - just click on the 'More' tab and select the 'Report an error option'.
Thank you in advance for your help, and please let us know if you have any other questions.
All the Best, Dan