Factcheck.org has been discredited. For you to use it shows you do not know what you are talking about or you may have an agenda. It is not a legitimate source.
Where was Obama born? What’s been discredited is the bogus claims that he wasnt born in Hawaii.
Nothing in the COLB has been shown to be wrong or false. Claims and assertions doubting it have not panned out. They are wrong. It’s a real and valid COLB.
http://www.factcheck.org/UploadedFiles/birth_certificate_5.jpg
Attacking the source is a logical fallacy known as “ad hominem”. If they are wrong (and sometimes they are), argue the facts not the person.