(KRON) - Grubhub users have reported receiving official-looking scam emails and app notifications encouraging recipients to send bitcoin to receive rewards as part of a limited-time holiday promotion, raising concerns that the company may have been hacked. The first email, sent Tuesday evening, pro mised that Grubhub would 10x any bitcoin sent to a specific wallet address contained in the email as part of a 'Holiday Crypto Promotion'. "For example, if you send $1,000, we'll send back $10,000", the email stated. A follow up email, sent less than an hour later, included recipients names, wished them a happy holidays and urged there were only '30 minutes' left in the promotion. The emails were sent from the addresses [email protected] and [email protected]. For those who received the messages to a Gmail account, the emails were 'verified' with a blue checkmark. According to Google's website the checkmark means "the sender has verified that they own the email address and brand logo." The scam emails do appear to originate from a valid Grubhub email domain. KRON4 reviewed recent official Grubhub promotional emails that were sent from the same domain (b.grubhub.com) but with a different username. In addition to the two emails, some users on X have also reported receiving push alerts on the Grubhub merchant app with an identical, too-good-to-be-true offer, urging users to send bitcoin. It appears some users may have fallen for the scam. KRON4 reviewed transactions associated with the bitcoin wallet account contained in the email. Since 8:42 p.m. (the time of the first email), the wallet has received multiple deposits totaling $4,207.07 as of 11:26 p.m. The transactions ranged in size; the smallest was 50 cents, the largest was nearly $1,000. KRON4 has reached out to Grubhub to ask if the scam email is related to any breach of user data. Earlier this year Grubhub reported a “security incident” that allowed “unauthorized access” to the contact information for an unknown number of customers and drivers. It is not clear if Tuesday's scam emails and notifications are related to the February incident. The scam email received by some Grubhub users appears to be a play off of a common cryptocurrency 'investment scam' warned about on the Federal Trade Commission Consumer Advice website, where scammers will promise free cash or cryptocurrency through an unsolicited email. If you fall victim to a crypto-related scam, the FBI website recommends you immediately file a report online at the Internet Crime Complaint Center. ...read more read less