Reducing false positive fraud alerts for online financial transactions

A computer system for preventing fraudulent online financial transactions, the computer system comprising:

• a location database configured to store geolocation data indicating geographic locations of authorized cardholders over time;
• one or more processors;
• and
• a non-transitory memory storing instructions that, when executed by the one or more processors, cause the one or more processors to
• receive a request to authorize a financial transaction, wherein the financial transaction (i) is associated with a debit or credit card account and (ii) is an online transaction purportedly being entered into by an authorized cardholder associated with the debit or credit card account,
• receive an IP address associated with a computing device at which information associated with the debit or credit card account was entered in connection with the financial transaction, and a transaction time associated with the financial transaction,
• determine, at least in part by using the IP address as a key to a geographic location database, a first geographic location associated with the computing device,
• receive, from a first location data source, first location data associated with the authorized cardholder at a first time;
• receive, from a second location data source different from the first location data source, second location data associated with the authorized cardholder at a second time different from the first time, wherein the first location data source and the second location data source each includes at least one of:
• a GPS data source of a mobile device associated with the authorized cardholder;
• a vehicle telematics data source of a vehicle associated with the authorized cardholder;
• a social media application associated with the authorized cardholder;
• a smart appliance associated with the authorized cardholder;
• or
• a WiFi access point;
• determine a second geographic location associated with the authorized cardholder, at a time associated with the transaction time, from the first location data and the second location data, wherein determining the second geographic location comprises comparing the transaction time to the first time and the second time;
• compare the second geographic location associated with the authorized cardholder to the first geographic location associated with the computing device, and
• in response to determining that the second geographic location does not correspond to the first geographic location, prevent the financial transaction from being executed.