The Federal Bureau of Investigation (FBI), with the aid of local police officers, on Tuesday raided the Forest Lake office of Alternate Billing Corporation.

On Thursday, the FBI posted a document on its Web site seeking information from consumers who believe that they've been improperly charged on their telephone bills by Alternate Billing or any of its affiliated companies.

“Our inquiry is ongoing, and while we can't provide any additional information at this time, we do need to hear from persons who believe they were improperly billed,” the FBI wrote on its Web site.

In a Friday e-mail to Twin Cities Business, Wyoming Police Department Chief of Police Paul Hoppe confirmed that his department, in conjunction with the FBI, executed a federal search warrant and raided the offices of Alternate Billing on Tuesday.

Hoppe said that the search warrant is currently under seal and unavailable for public review.

The Wyoming Police Department has been receiving complaints regarding Alternate Billing throughout the past year, according to Hoppe, who said that he cannot disclose additional details because the case is under investigation.

Alternate Billing could not be reached for comment on Friday. According to its Web site, the company specializes in local exchange carrier billing and call center service solutions.

Consumer complaints can be made via an online form on the FBI's Web site. The link also provides a list of companies and services affiliated with Alternate Billing.

The FBI is seeking the following information from customers who believe they've been improperly billed: contact information; a list of the company and/or companies that billed the consumer; and an estimated financial loss based on the billing.