BEND, OR -- Email scams directed toward businesses are up 50-percent this year. Danielle Kane, with the Oregon Better Business Bureau, says the spearfishing attacks target high ranking executives. She says the most common scam they use  is a fake invoice claiming to be from one of the company vendors. When money is paid by wire transfer the average loss is 35-thousand dollars. Businesses can help avoid the scams by using multi-factor authentication, verify vendor information and train employees on how to spot and avoid these scams.