Film Otago and Southland co-ordinator Antony Deaker confirmed Waititi was officially in Dunedin to scout sites for an upcoming television commercial he is directing.
However, he could not say what the advertising project was.
"It seems he comes here a lot. We've got great architecture [for filming]. That's the thing."
Waititi was last in Dunedin in April this year, searching for filming locations for a television series adaptation of the popular 1980s movie Time Bandits.
Waititi is an executive producer, co-writer and director of the television series, which is in development at Apple.
Waititi's film career was set in motion by his acting debut in the classic 1999 student adventure film Scarfies, which was set and filmed in Dunedin.
More recently, he has won acclaim for the popular films Thor: Ragnarok and Jojo Rabbit.