[Sleeep]

https://www.fcc.gov/document/fcc-warns-can-you-hear-me-phone...

>The scam begins when a consumer answers a call and the person at the end of the line asks, “Can you hear me?” The caller then records the consumer's "Yes" response and thus obtains a voice signature. This signature can later be used by the scammers to pretend to be the consumer and authorize fraudulent charges via telephone.

In other words they splice together "do you want to authorize these charges?" And your "Yes" and present this as "proof" to the credit card company you authorized the charges you are disputing.

[rrauenza]

Status unproven: http://www.snopes.com/can-you-hear-me-scam/

[Sleeep]

I should have added a caveat, I actually agree with you and I, too, was skeptical of the fact this has been happening. However, since the FCC released an official document about it I figured it was worth mentioning as a theoretical possibility. I am unaware of many cases where the FCC spread urban legends without getting actual complaints, so people presumably have actually been complaining about this happening to them to the FCC, or at least them believing it's happened to them.

The "can you hear me" call would have to take place AFTER a scammer had already charged your card for a dubious service. They would (probably?) have to have a merchant account with a payment processor for that.