Scammers posing as Ledger, a hardware wallet manufacturer, are sending physical letters to crypto users instructing them to “validate” their wallets or risk losing access to funds, in the latest phishing attack to impact the industry.

BitGo CEO Mike Belshe shared a picture of the scam letter, which featured a QR code, presumably linked to a malicious phishing site. The letter was sent through the United States Postal Service (USPS), according to the executive.

“These are all scams do not fall for any of these,” Troy Lindsey wrote after receiving a copy of the phishing letter.

A copy of the scam Phishing letter. Source: Mike Belshe

Cointelegraph reached out to Ledger for comment but was unable to obtain a response by the time of publication.

This phishing attempt highlights the ever-evolving complexity and tactics of social engineering scams designed to steal crypto private keys, user funds, and other sensitive data from unsuspecting victims.

Related: Hackers using fake Ledger Live app to steal seed phrases and drain crypto

Coinbase and crypto users hit hard by phishing attacks in 2025

In April 2025, $330 million in Bitcoin (BTC) was stolen from an elderly individual through a phishing attack, onchain detective ZackXBT confirmed in an April 30 X post.

“Two suspects in the $330 million heist include ‘Nina/Mo’ — a Somalian who operates a call scam center in Camden, UK — and an accomplice ‘W0rk,’ who assisted with the site and call,” the onchain security analyst said in an update.

On May 15, crypto exchange Coinbase announced it was the target of a ransom attempt after customer service contractors, who were later fired by the company, leaked user data to threat actors.

The scammers demanded a $20 million ransom, which Coinbase refused to pay, and the stolen data included names, addresses, contact information, and a limited amount of other sensitive account data belonging to a small subset of Coinbase customers.

No private keys, login credentials, or accesses to Coinbase Prime accounts were compromised during the leak, according to the exchange.

TechCrunch founder Michael Arrington was highly critical of the exchange for the security failure, arguing that it will lead to physical violence against customers exposed in the hack.

Magazine: Crypto-Sec: Phishing scammer goes after Hedera users, address poisoner gets $70K

Decentralizing telecommunication networks financially benefits small businesses and telecom corporations alike, according to Frank Mong, the chief operating officer (COO) of Nova Labs, the founding team behind the Helium wireless decentralized physical infrastructure (DePIN) network.

In an interview with Cointelegraph at Consensus 2025 in Toronto, Canada, Mong said that small businesses including bars, restaurants, convenience stores, and other local operators can generate revenue by hosting wireless hotspots and expanding network coverage.

Large telecommunication companies and service providers can also tap into the Helium Network’s telemetry to reduce operational costs and expand network coverage in dead zones.

Pictured from left to right at Consensus 2025, the Realest.Com founder DJ Skee Keeney, Nova Labs COO Frank Mong, CEO of KYD Labs Ahmed Nimale, and CoinDesk senior anchor Jennifer Sanasie. Source: Cointelegraph

“It costs about $300,000 for a telecom company to stand up one tower; you need one per block for 5G to work effectively,” Mong told Cointelegraph, The executive added:

“Instead of doing that and making phone plans more expensive, what if anyone with a useful Wi-Fi network shares that Wi-Fi and allows, not just anyone to use it securely, but allows large companies like AT&T to see the telemetry of that network.”

Decentralized physical infrastructure networks continue to be an example of how blockchain technologies can provide real-world value and make existing infrastructure more resilient to outages, disruptions, censorship, and critical failure.

Related: Countries must add DePIN tokens to their digital asset stockpiles

Helium secures collaborative partnerships with telecom companies

In January 2024, Nova Labs announced a collaborative partnership with Latin American telecommunication company Telefónica to expand the telecom company’s coverage in dead zones and help reduce network congestion.

More recently, in April 2025, Helium partnered with AT&T — a global telecommunication giant — to allow AT&T users automatic access to the Helium Network when in range of the network’s coverage area of mobile hotspots.

Data from the Helium Network shows that the United States currently has the highest concentration of the network’s 95,272 mobile hotspots. Additionally, Helium has 284,053 active Internet of Things (IoT) hotspots worldwide.

An overview of the Helium Network’s mobile hotspots around the world. Source: Helium

“Ultimately, what we did in the United States and Mexico should be global,” Mong told Cointelegraph.

Nova Labs is currently focused on expanding coverage through securing collaborative partnerships with telecommunication infrastructure providers in new regions, the executive added.

Magazine: Most DePIN projects barely even use blockchain: True or false?

Decentralizing telecommunication networks financially benefits small businesses and telecom corporations alike, according to Frank Mong, the chief operating officer (COO) of Nova Labs, the founding team behind the Helium wireless decentralized physical infrastructure (DePIN) network.

In an interview with Cointelegraph at Consensus 2025 in Toronto, Canada, Mong said that small businesses including bars, restaurants, convenience stores, and other local operators can generate revenue by hosting wireless hotspots and expanding network coverage.

Large telecommunication companies and service providers can also tap into the Helium Network’s telemetry to reduce operational costs and expand network coverage in dead zones.

Pictured from left to right at Consensus 2025, the Realest.Com founder DJ Skee Keeney, Nova Labs COO Frank Mong, CEO of KYD Labs Ahmed Nimale, and CoinDesk senior anchor Jennifer Sanasie. Source: Cointelegraph

“It costs about $300,000 for a telecom company to stand up one tower; you need one per block for 5G to work effectively,” Mong told Cointelegraph, The executive added:

“Instead of doing that and making phone plans more expensive, what if anyone with a useful Wi-Fi network shares that Wi-Fi and allows, not just anyone to use it securely, but allows large companies like AT&T to see the telemetry of that network.”

Decentralized physical infrastructure networks continue to be an example of how blockchain technologies can provide real-world value and make existing infrastructure more resilient to outages, disruptions, censorship, and critical failure.

Related: Countries must add DePIN tokens to their digital asset stockpiles

Helium secures collaborative partnerships with telecom companies

In January 2024, Nova Labs announced a collaborative partnership with Latin American telecommunication company Telefónica to expand the telecom company’s coverage in dead zones and help reduce network congestion.

More recently, in April 2025, Helium partnered with AT&T — a global telecommunication giant — to allow AT&T users automatic access to the Helium Network when in range of the network’s coverage area of mobile hotspots.

Data from the Helium Network shows that the United States currently has the highest concentration of the network’s 95,272 mobile hotspots. Additionally, Helium has 284,053 active Internet of Things (IoT) hotspots worldwide.

An overview of the Helium Network’s mobile hotspots around the world. Source: Helium

“Ultimately, what we did in the United States and Mexico should be global,” Mong told Cointelegraph.

Nova Labs is currently focused on expanding coverage through securing collaborative partnerships with telecommunication infrastructure providers in new regions, the executive added.

Magazine: Most DePIN projects barely even use blockchain: True or false?

Decentralizing telecommunication networks financially benefits small businesses and telecom corporations alike, according to Frank Mong, the chief operating officer (COO) of Nova Labs, the founding team behind the Helium wireless decentralized physical infrastructure (DePIN) network.

In an interview with Cointelegraph at Consensus 2025 in Toronto, Canada, Mong said that small businesses including bars, restaurants, convenience stores, and other local operators can generate revenue by hosting wireless hotspots and expanding network coverage.

Large telecommunication companies and service providers can also tap into the Helium Network’s telemetry to reduce operational costs and expand network coverage in dead zones.

Pictured from left to right at Consensus 2025, the Realest.Com founder DJ Skee Keeney, Nova Labs COO Frank Mong, CEO of KYD Labs Ahmed Nimale, and CoinDesk senior anchor Jennifer Sanasie. Source: Cointelegraph

“It costs about $300,000 for a telecom company to stand up one tower; you need one per block for 5G to work effectively,” Mong told Cointelegraph, The executive added:

“Instead of doing that and making phone plans more expensive, what if anyone with a useful Wi-Fi network shares that Wi-Fi and allows, not just anyone to use it securely, but allows large companies like AT&T to see the telemetry of that network.”

Decentralized physical infrastructure networks continue to be an example of how blockchain technologies can provide real-world value and make existing infrastructure more resilient to outages, disruptions, censorship, and critical failure.

Related: Countries must add DePIN tokens to their digital asset stockpiles

Helium secures collaborative partnerships with telecom companies

In January 2024, Nova Labs announced a collaborative partnership with Latin American telecommunication company Telefónica to expand the telecom company’s coverage in dead zones and help reduce network congestion.

More recently, in April 2025, Helium partnered with AT&T — a global telecommunication giant — to allow AT&T users automatic access to the Helium Network when in range of the network’s coverage area of mobile hotspots.

Data from the Helium Network shows that the United States currently has the highest concentration of the network’s 95,272 mobile hotspots. Additionally, Helium has 284,053 active Internet of Things (IoT) hotspots worldwide.

An overview of the Helium Network’s mobile hotspots around the world. Source: Helium

“Ultimately, what we did in the United States and Mexico should be global,” Mong told Cointelegraph.

Nova Labs is currently focused on expanding coverage through securing collaborative partnerships with telecommunication infrastructure providers in new regions, the executive added.

Magazine: Most DePIN projects barely even use blockchain: True or false?