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Originally Posted by boristhebold
For example using the concepts and technology that banks for example have in place to prevent fraud or at least flag something that looks like fraud.
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and of course no legitimate bank customer has ever been frustrated by over zealous bank anti-fraud checks (at least when HSBC leave me standing in a US airport unable to pay for goods, I can console myself it was "me" they were aiming to protect). Frustrating your real customers with no benefit to them is not good business practice. Especially when Amazon / Gumtree and others will be happy to provide an alternative marketplace and I'm sure google can't be far behind!
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They could run an automtive process which flags up say really bad grammar,
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but bad grammar isn't the issue in "these" ebay scams is it? because they just cut'n'paste from similar ads? the vaguely intelligent buyer will be naturally suspicious of someone selling several thousand pounds of product who can't string a sentence together.
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images appearing in other adverts within a time period,
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The scammers will have worked around that within the course of a day. Apply an auto crop, or auto watermark tool and the image is no longer a match or use images that are older than the cut off.
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adverts posted from known scammer email addreses
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ebay doesn't post adverts from "email addresses" it posts from accounts. When an account is identified as a scammer ebay closes the account (and blocks the email address). Of course its really easy to create new email addresses, and some people will be persuaded to contact people on email addresses not associated with the account, but ebay can't help buyers who ignore their advice.
I'm sure they will have IP blocking capability but its not difficult to (a) use a proxy; (b) use legitimate IP addresses from hacked users; (c) use dynamically assigned IP addresses; (d) use shared networks with potentially legit users you don't want to block.
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flag certain countries as known risk areas,
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but the ads you are worried about don't appear to be "foreign" - they are posted on ebay.co.uk from uk registered accounts.
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flag payment options etc etc,
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certain payment options already do this. I think it is mandatory to offer paypal (which is notorious for favouring the buyer in disputes - offering them significant protection). Of course if the buyer / seller discuss other payment options "in private" ebay can't help.
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running soem type of process like that would flag obvious scammers from real people most of the time.
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but actually almost any human buyer will spot those signs too... ...the scams most likely to succeed are the ones where the advert is a clone of a legit ad, has hacked a legit account and only at the final stages of a deal does the user get persuaded to use a non-ebay sales process to close the deal.
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...so its flagged as a possible scam which they could then state on the advert or auto post back to originator to address before posting.
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don't assume that the scammers are naive or individuals, I believe they will be pretty tech savvy and likely running multiple parallel scams, any feedback you give helps them learn the scam detection algorithm and work around it. Meanwhile some legit users will inevitably become false positives.
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None of which would involve any manual process, all could be done automaticly and could easily help the situation.
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The head of security at ebay must be delighted to have such innovated solutions offered, he'll probably be wondering why nobody in his team came up with it himself. I'd get your application in now:
Director GTM & Security Ops EBay jobs in San Jose at eBay Inc. with insight like that you might even be able to negotiate on the location if you don't fancy San Jose ;-)