The first incident happened at 3:50 p.m. on December 7 in the 1000 block of Morris Street.
The man took a package and then fled toward 12th Street.
The second incident happened at 4:30 p.m. on December 9 in the 100 block of Carpenter Street.
Again, the man is seen taking a package from the doorstep. He then takes off toward 2nd Street.
Anyone with information is asked to contact Philadelphia police at 215-686-TIPS (8477).