After mounting complaints about mismanagement of customers’ money, Attorney General Maura Healey’s office is leading the investigation into Dartmouth-based travel agency Terry’s Travel.

A spokesperson for Attorney General Maura Healey said the office has received 31 complaints against Terry’s Travel as of Aug. 11.

Allegations that Natercia Sousa, the president of the travel agency that operated on 6A Hathaway Road, took money and did not book reservations began in late July after an Acushnet couple, Kristine Mello and Jeffrey Ferreira, went public with their story of being swindled by the company.

Attorney Kevin Medeiros, who is representing the couple, said the couple and 45 of their friends and family booked a destination wedding in Mexico. The group collectively spent about $70,000.

“They booked this trip with [Sousa] three or four months prior, and they received an email with confirmation. But it didn’t say ‘confirmation of full payment,’” said Medeiros.

He said the confirmation was for a $200 deposit, which Sousa had placed on each party member. However, each person had made a payment in full for approximately $1,500 to $1,600.

“They got confirmation thinking they were good to go, but they never received an itinerary or further information,” said Medeiros. “So they followed up with [Sousa] a couple weeks prior to their departure date, and she said that she would be booking it soon.”

“They kept calling her and eventually they showed up at her place, and there was a sign: ‘Closed due to a family emergency.’ That’s when they figured out she wasn’t giving the remaining amount to the reservations,” he said.

Sarah Bettencourt, another customer of Terry’s Travel, said she and her fiancé, George Simone, experienced a similar situation. The wedding party of 20 paid $30,000 for a destination wedding in the Dominican Republic. Like the other group, Bettencourt’s wedding party had received confirmation that Sousa put $200 down on the flight and resort.

“Most everyone booked with a credit card,” said Bettencourt, adding that some family members got at least part of their money back. “Unfortunately, my husband and I paid cash.”

Bettencourt said that Sousa called several of her family members about three weeks ago to inform them that their balances were due on Aug. 1. When the news broke about Mello and Ferreira, Bettencourt went to Terry’s Travel and was met with the “closed” sign.

It was around then that the Dartmouth Police Department got involved.

“We started getting flooded with complaints from people who had gotten into the same [situation],” said Detective Kyle Costa. “We’re still getting complaints. They’re not coming in as fast as they first did, but there are around 60.”

Costa estimates the total amount of money owed to the various customers is about $190,000.

Costa said the business has since been shut down. The “closed” sign that hung outside the office building has also been removed. Multiple attempts to call Sousa have gone unanswered.

“We’ve been in close contact with the attorney general’s office throughout, collecting information,” said Costa. “They’re going to be taking a lead on it, and we’re going to be actively assisting them.”

A representative of the attorney general’s office said the first complaint regarding Terry’s Travel was filed back in December 2014, but the remainder have been more recent. Maura Healey’s office started communicating with the Dartmouth Police Department regarding the cases earlier this month.

The spokesperson said that, because the investigation is active and ongoing, she could not comment further at this time.

While the cases are being reviewed, Costa recommends that those affected file complaints with the department.

“We’re asking people that, if there are any other victims, make sure they present themselves and make themselves known,” said Costa.

“It’s going to be a long process,” he said.

“We don’t want victims to feel as if it’s not moving forward if they don’t hear things. It takes a lot of man-hours to go through all of this information. When we go through all of it, and if we find out that all these stories are valid, then legal action will be taken.”