BRENTWOOD — A woman tied to a $100,000 phony check cashing scheme will plead guilty to charges she cashed a bogus payroll check that appeared to be from a Dunkin' Donuts at the Manchester-Boston Regional Airport, court documents say.

Sarah Tavano, 25, of Manchester, is set to become the latest person to be convicted in Rockingham County Superior Court as part of a group that cashed checks at banks in Manchester, Londonderry, Derry, Concord, Bedford, Hooksett and Goffstown.

Police began arresting people connected to the ring, which they claim had seven members, last February.

Tavano will appear in court March 13 to enter her guilty plea and to be sentenced.

She faces charges of forgery and theft by deception for cashing a check for $881 at a Londonderry bank by posing as a Dunkin Donuts employee, according to a police affidavit and indictments.

Tavano did not work for the business.

Police found that an employee who worked at two of the Dunkin Donuts stores at the airport between September and November 2010 had supplied what became the blueprint for 15 phony checks, Londonderry police Officer Sean Doyle wrote in an affidavit.

That employee, Sheldon Frost, 23, of Nashua was sentenced to 12 months Dec. 13 after pleading guilty to conspiracy to commit theft by deception.

Frost's name appeared on one of the 15 bogus checks cashed at a local bank, which drew the attention of his former employer and police, the affidavit said.

Terms of Tavano's plea deal have not been made public.

She faces up to 3 ½ to 7 years in state prison and a $4,000 fine, but the plea deal likely means she will be given a reduced sentence.

A grand jury indicted another woman, Mary Phillips, 27, of Manchester, in November on a single count of forgery for allegedly cashing one of the checks at a bank in Derry on Jan. 31, 2011.