I just found a fraudulent ATM withdrawal on my bank statement this morning, After working out the details with Wells Fargo, I feverishly logged onto the forum, only to find gailshoults' post about a similar thing. Here are the details:
1. It was our second time in Los Cabos (first time was back in 2005). Our recent vacation was from Feb 16 to 23.
2. I did not plan on using my debit card at all, due to all the advice from the forum, and because Wells Fargo charges $5 per ATM transaction on top of local fees. We brought cash and exchanged some of it on our first day at our hotel (Sheraton Hacienda del Mar).
3. On Feb 19, we were getting afternoon massages at Lolos Massage, and ran out of cash (both dollars and pesos). We also parked at the paid parking lot in front of Wyndham (we found most convenient to park there for our EcoCat whale watching trip earlier that day), so we really needed cash.
4. We knew that if we were to use an ATM, that it was safer to use the ATM's affiliated with a bank. I remember seeing a "bank" (in hindsight, maybe it was a cambio or a bank) at the northeastern corner of the Wyndham building, closest to the exit/payment gate of the parking lot (at the Vicente Guerrero and Paseo de la Marina intersection). Can't recall the name, but this "bank" had a green sign posted on the building frontage, and there was a line of people formed outside the doors. I saw a sign that said passports were needed to get money. I asked the security guard at the door where the bank's ATM was. He directed me to the side of the building (along the breezeway/under the archway between the two buildings, which for reference, is the extension of Vicente Guerrero leading to the marina). I proceeded to use that ATM, thinking that it was affiliated with the bank. I canceled the transaction as soon as I started doubting whether it was really a reputable bank ATM.
5. I then walked further up Paseo de la Marina, where I found another security guard who directed me to the Santander bank ATM in Aramburo plaza. They have this little covered kiosk with two ATMs, just outside of the bank's front doors. I went ahead and got money there.
6. Once we got back home, I checked our bank account and credit card account for any fraud, and was happy that everything was fine.
7. This Monday morning, there was an ATM withdrawal for almost $400 from Bogota reported as a "pending transaction" on our bank account. Wells Fargo indicated that after that first attempt (where the $400 was successfully withdrawn), more withdrawals were attempted ALL DAY last Saturday. It was at this time that Wells Fargo closed the debit card.
In summary, I would caution Cabo visitors about using an ATM card at all (literally, "inserting" a debit card at ANY machine). Just remember to bring enough cash on day and evening outings. Also worth noting that we did not have any problems using our credit card at the restaurants we went to (Deckman's, El Farallon, Meson del Angel, Maro's Shrimp House, La Fonda, Sunset da Mona Lisa, Hacienda Cocina y Cantina). We paid cash at Las Guacamayas and El Toro Guero, parking, Lolos, and small shops. We used our credit card for all hotel/food/spa/kids club charges, and at Walmart and La Europea.