Authorities and media outlets across multiple countries have issued warnings about various scams targeting individuals through phone calls, messages, and WhatsApp groups. In particular, calls or messages originating from the United Kingdom, identified by the +44 prefix, have been highlighted as potential scams. The UK's HM Revenue and Customs (HMRC) has cautioned home workers against falling for quick refund advertisements that could result in financial losses, while pensioners are encouraged to verify if they are eligible for tax refunds of nearly £3,000. Additionally, warnings have been issued about WhatsApp scams involving false claims such as suspended flights and requests for personal belongings. Spain's National Securities Market Commission (CNMV) has also alerted the public to fraudulent WhatsApp groups where scammers pose as financial experts offering investment training and recommendations. These alerts aim to raise awareness and help individuals avoid becoming victims of these sophisticated fraud schemes.