Authorities in Spain have issued multiple warnings regarding a surge in scams targeting individuals, particularly involving fraudulent phone calls and letters. The National Police has alerted the public about a scam known as 'voice hacking', where scammers impersonate trusted sources to extract sensitive information. The Las Vegas Metropolitan Police Department reported similar incidents in Clark County, where victims receive calls from individuals posing as bank employees, claiming suspicious activity on their accounts. The U.S. Securities and Exchange Commission has also highlighted common red flags for scams aimed at older investors, including time-sensitive offers and promises of high guaranteed returns. Additionally, the Spanish Social Security has cautioned about a fraudulent letter requesting personal identification and bank statements, emphasizing that these scams are designed to steal personal data and funds.