The Internal Revenue Service (IRS) and Security Summit partners recently issued a reminder to tax professionals to watch for signs of data theft that could lead to the filing of fraudulent tax returns. Warning signs include receiving unexpected copies of tax transcripts or IRS notices and experiencing network slow-downs or lock-outs.

“Learning the signs of identity theft is critical for anyone handling taxpayer data,” said IRS Commissioner Chuck Rettig. “It can be as subtle as an unusually slow computer system or as obvious as multiple clients unexpectedly receiving the same IRS notice. Paying attention to these details is critical, and fast action alerting the IRS and calling in a security expert can help protect taxpayers and your business.”

The complete list of data security warning signs is available here.