Kevin MCglynn was detained by cops on July 24 and he was arraigned on charges of stalking, menacing, and harassment in Manhattan Criminal Court the next day, reported TMZ.
The 53-year-old is accused of sending a batch of threatening messages to the 'Umbrella' hitmaker, delivering many of them by hand to her apartment in the Big Apple.
On his third visit earlier this month, the homeless man dropped his benefits card in the 26-year-old singer's SoHo building leaving his address.
Rihanna's lawyer told the court that MCglynn's alleged behaviour caused the singer to 'fear for her physical safety'.
MCglynn has been held without bail.