BOSTON — Attorneys general from 20 states and the District of Columbia are faulting Education Secretary Betsy DeVos for rolling back Obama-era guidance they said is helping protect student loan borrowers.

In a letter sent Monday, Democratic attorneys general Maura Healey of Massachusetts and Lisa Madigan of Illinois called on DeVos to restore the memos instituted by the federal Education Department last year under President Barack Obama.

The attorneys general said the guidance is designed to help borrowers get accurate information about their loans and repayment options — ensuring the consistency of service provided by student loan servicers and increasing accountability.

The letter was co-signed by attorneys general of 18 states, including California, Connecticut, Hawaii, Iowa, Kentucky, Maine, Maryland, New York and Minnesota.