He provided the role of The Stranger to actor
Tony Anthony
and played the villain in The Stranger's first movie
Um Dólar Entre Os Dentes (1967) as a favor for Anthony. The part became Anthony's most famous role besides his
O Justiceiro Cego (1971) and he repeated it three times. Several months before Frank Wolff's death, according to Anthony
himself, Frank Wolff asked him for a similar favor, wanting the role in
O Justiceiro Cego (1971), which was finally taken by
Ringo Starr. It was kind of deal between them, Anthony would provide him role, because Wolff had done him a favor earlier.
But the producers wanted Ringo Starr for the role - Wolff was dropped and had a falling out with Anthony. About one year later Frank Wolff killed himself. There have always been rumors, one reason for the suicide was, he saw his career at an end/thought he couldn't get the roles he wanted anymore.