You can report an item you lost in a taxi even if you do not have the taxi medallion number. You should also call the Lost Property Police Precincts in each borough to see if your item was turned in there.
Manhattan
17th Precinct
167 East 51st Street
(212) 826-3211
(212) 826-3212
(212) 826-3246
Central Park Precinct
86th Street and Transverse Road
(212) 570-4821
Brooklyn
76th Precinct
191 Union Street
(718) 834-3211
94th Precinct
100 Meserole Avenue
(718) 383-3879
Queens
107th Precinct 71-01 Parsons Boulevard
(718) 969-5100
115th Precinct
92-15 Northern Boulevard
(718) 533-2002
Bronx
43rd Precinct
900 Fteley Avenue
(718) 542-0888
Staten Island
120th Precinct
78 Richmond Terrace
(718) 876-8500