U.S. 2010 Census takers have started going door-to-door to follow up with households that either didn’t mail back their form or didn’t receive one.

An estimated 48 million addresses across the country will be visited through July 10.

The Census Bureau is urging cooperation and patience with the census takers, as this is the best way to ensure that everyone is counted properly.

The census taker must present an ID badge that contains a Department of Commerce watermark and expiration date.