Actress Lori Loughlin, her husband and several other parents are pleading not guilty to charges filed against them in the college admissions scandal, according to court documents, a development that underscores the divergent legal strategies of those accused in the case.

Loughlin and her husband, fashion designer Mossimo Giannulli, who live in Los Angeles, are accused of fraud conspiracy and money laundering conspiracy in an alleged bribery scam that prosecutors say was intended to secure admission for their two daughters to the University of Southern California. Loughlin became known for her role as Aunt Becky in the television sitcom “Full House.”

She and Giannulli waived their right to appear in federal court in Boston for arraignment as they filed not-guilty pleas Monday through signed statements. Prosecutors allege that the couple paid a total of $500,000 to facilitate admission of their daughters to USC as purported crew recruits.

An attorney for the couple declined to comment Monday.

They are among 33 parents who prosecutors say paid bribes to help get their children into prominent universities in a scheme orchestrated by admission consultant William “Rick” Singer. Some paid to obtain fraudulent scores on the ACT or SAT tests, prosecutors allege, while others paid to have their children designated as recruited athletes even though they lacked credentials to compete at the intercollegiate level.

Singer has pleaded guilty to racketeering conspiracy and other crimes and is cooperating in the case.

Among the accused parents who were his clients, 13 agreed last week to plead guilty to conspiring to commit mail fraud and honest services mail fraud, prosecutors say. Those defendants, including actress Felicity Huffman of Los Angeles, are scheduled to appear for plea hearings next month in U.S. District Court in Boston. It is not clear what penalty they will face. The fraud-conspiracy charge carries a maximum sentence of 20 years in prison and substantial fines. (One of the 13 also agreed to plead guilty to money laundering conspiracy.)

Others are fighting the allegations in a case that could hinge on whether payments the parents made are judged to have been bribes or simply contributions to university athletic programs and a charity Singer controlled.

Court documents show at least eight others in addition to Loughlin and Giannulli have filed pleas of not guilty in recent days: Gamal Abdelaziz, of Las Vegas; I-Hsin “Joey” Chen, of Newport Beach, Calif.; Amy Colburn and Gregory Colburn, of Palo Alto, Calif.; Michelle Janavs, of Newport Coast, Calif.; Elisabeth Kimmel, of Las Vegas; David Sidoo, of Vancouver, Canada; and Robert Zangrillo, of Miami.

In all, 50 people were charged in the case. The scandal, made public last month, has raised questions about equity in admissions to competitive colleges and universities.