This HOWARD COSELL AUTHENTIC DOUBLE SIGNED 3X8.25 AUGUST 1969 CHECK PSA/DNA SLABBED has been certified authentic. Cosell signed this check on the back twice, once, "Howard Cosell" and the other, "Howard W. Cosell". It comes slabbed and authenticated by PSA/DNA. You can also see the authentication on the PSA/DNA website, PSAcard.com.