Aimal Mehrabi

US Patent:

20150348040, Dec 3, 2015

Filed:

May 30, 2014

Appl. No.:

14/292098

Inventors:

- San Francisco CA, US
Aimal Mehrabi - San Francisco CA, US

Assignee:

Square, Inc. - San Francisco CA

International Classification:

G06Q 20/40
G06Q 20/20

Abstract:

Techniques and arrangements for detecting potentially fraudulent transactions made on a point-of-sale (POS) device. In some instances, the POS device may upload a batch of authorization requests corresponding to transactions made on the POS device while the POS device was in an offline mode. A payment service may receive this batch and, as opposed to processing the entire batch, may select a subset for processing. After selecting the subset, the payment service may attempt to authorize payment instruments associated with each transaction of the subset. The payment service may then compare an amount of declined payment instruments to a threshold. If the amount is greater than the threshold, then the payment service may flag the subset and/or the batch as fraudulent and may refrain from processing further transactions of the batch.