If you face any kind of theft, such as theft of personal items or theft during traveling, you can file an FIR with the nearest police station. The police will conduct the required investigation. Please see here to know how to file an FIR.
You can also file an online FIR in some states. Follow the steps given below to lodge an online FIR in Delhi:
Step 1: Visit the Delhi Police Official Website.
Step 2: Select ‘Citizen Services’.
Step 3: Several options will come, such as Complaint Lodging, Theft e-FIR, etc. Choose the relevant option.
Step 4: File FIR/complaint accordingly.
Step 5: After you submit your complaint, you will receive a copy of your e-FIR in PDF form. You should download it.