Gardaí are asking people to be vigilant when receiving text messages, phone calls or emails seeking additional delivery costs of parcels.
The messages appear to be from authentic delivery services but are fraudulent.
In a statement issued on Facebook Gardaí advised the public not to reply to the messages.
"DHL, An Post and other delivery services do not seek additional payments for the delivery of goods to be completed.
"All postage costs are covered at point of sale.
"Please do not engage by replying to such messages," they stated.
They continued to add that scams such as this are becoming more common and harder to detect:
"Scam attempts are on the rise through the many forms of communication and social media.
"The crime prevention officer for West Cork is aware that these attempts to defraud people of money can appear to be genuine and he is asking people to think about what's being offered.
"Don't hand over any bank details or visa card details and don't click on any links made available."
If you think you may be the victim of a scam, the advice is to contact the Gardaí and your bank immediately.