Tracking Conversions

A system comprising:

• one or more processors configured to interact with a machine readable storage medium in order to perform operations including:
• presenting one or more ads to a user;
• receiving point of sale receipt information from the user, where the receipt image is associated with a redemption of a first ad of the one or more ads presented to the user, the redemption occurring at a physical retail location;
• processing the receipt information to extract text associated with the receipt information;
• determining that the extracted text associated with the receipt information is associated with the first ad presented to the user;
• and
• logging a conversion for the first ad.

A computer storage medium encoded with a computer program, the program comprising instructions that when executed by data processing apparatus cause the data processing apparatus to perform operations comprising:

• presenting one or more ads to a user;
• receiving point of sale receipt information from the user, where the receipt image is associated with a redemption of a first ad of the one or more ads presented to the user, the redemption occurring at a physical retail location;
• processing the receipt information to extract text associated with the receipt information;
• determining that the extracted text associated with the receipt information is associated with the first ad presented to the user;
• and
• logging a conversion for the first ad.