Topic: EarnFreeCoin: How we caught a fraudulent activity? (Read 265 times)

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One of the users of EarnFreeCoin raised a concern that he is not able to withdraw after reaching 300000 satoshis, I checked with the system logs and found this

6756   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:40:35.000000
6757   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 12:40:39.000000
6758   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:40:42.000000
6759   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 12:40:48.000000
6760   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 12:40:53.000000
6761   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:40:57.000000
6762   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:44:02.000000
6763   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 12:44:06.000000
6764   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 12:44:10.000000
6765   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 12:44:14.000000
6766   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 12:44:18.000000
6767   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 12:44:23.000000
6768   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:47:17.000000
6769   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 12:47:21.000000
6770   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 12:47:24.000000
6771   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:47:29.000000
6772   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:47:34.000000
6773   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:47:40.000000
6774   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:52:44.000000
6775   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:52:48.000000
6776   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 12:52:52.000000
6777   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 12:52:57.000000
6778   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:53:01.000000
6779   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 12:53:08.000000
6780   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 12:53:14.000000
6781   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 12:57:26.000000
6782   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 12:57:31.000000
6783   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 12:57:35.000000
6784   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:57:40.000000
6785   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:57:44.000000
6786   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 12:57:49.000000
6787   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 12:57:55.000000
6788   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 13:01:06.000000
6789   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:04:10.000000
6790   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:04:14.000000
6791   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:04:17.000000
6792   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:04:25.000000
6793   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 13:04:30.000000
6794   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 13:04:34.000000
6795   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:07:28.000000
6796   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 13:07:33.000000
6797   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:07:37.000000
6798   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:07:42.000000
6799   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:07:46.000000
6800   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:07:50.000000
6801   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:07:57.000000
6802   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 13:11:07.000000
6803   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 13:11:11.000000
6804   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:11:14.000000
6805   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 13:11:20.000000
6806   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 13:11:25.000000
6807   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 13:11:31.000000
6808   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:11:36.000000
6809   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 13:15:21.000000
6810   b4ffd4d5-141c-405a-a6fa-81919765976e   23   2017-09-07 13:15:25.000000
6811   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:15:29.000000
6812   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:15:34.000000
6813   b4ffd4d5-141c-405a-a6fa-81919765976e   20   2017-09-07 13:15:39.000000
6814   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:15:43.000000
6815   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:15:48.000000
6816   b4ffd4d5-141c-405a-a6fa-81919765976e   25   2017-09-07 13:17:25.000000
6817   b4ffd4d5-141c-405a-a6fa-81919765976e   21   2017-09-07 13:17:52.000000
6818   b4ffd4d5-141c-405a-a6fa-81919765976e   22   2017-09-07 13:22:07.000000
6819   b4ffd4d5-141c-405a-a6fa-81919765976e   24   2017-09-07 13:22:12.000000

In many instances he has claimed before 30 seconds which is the first check we do in fraud detection.

These kind of users are threat to Bitcoin Faucets. Most Faucet owners will blindly integrate with Facethub or other similar service and lose lot of money.

If you are building a Faucet, please put proper fraud detection in place.