I wouldn't say it's an issue, but we get the occasional internet dating service or internet, ummm...friend finder...service or more often internet, errr...video...service dispute.
When we go through the investigation process we often get back proof of the authorization, and have to follow up with the customer.
But sometimes the dispute process ends abruptly after we look the transaction up and tell them "actually, that transaction was made on your husband's/wife's card". In these cases we don't have to follow through on the investigation, but we do keep an eye on the obituaries for the next few days