Teen Girls and False Allegations???

Hey Everyone, There is a 16 year old girl that is in our state that "matches" our family. However, my husband is now concerned about false allegations. When we were in our training classes and they were going over kids making false allegations he was absolutely sick by it. The thought that his whole world (his family) could be turned upside down by a false allegation stresses him out. She doesn't have a history of making allegations that we know of. Anyone have advice or thoughts on this topic? This would be an adoptive placement (I'm not sure if that makes any difference???). Thanks!