Sole proprietors and general partnerships operating under a trade -- or "assumed" -- name are required by Maine law to file that name with the municipal clerk where the business is located (Title 31 M.R.S.A. §§1 & 2). (If you have a corporation and file with the Secretary of State, then this requirement does not apply.)
Licenses for sole proprietors doing business as something other than the owner’s name – are often called “DBA” forms. Licenses for those associated as partners engaging in a mercantile enterprise – a business to do with trade or commerce or the buying and selling of merchandise – are called Certificate for Association for Purpose of Engaging in Mercantile Enterprise.
The primary purpose of this filing requirement is to protect the public against fraud and deceit in extending credit. The filings enable people dealing with merchants transacting business under a partnership or assumed name to ascertain from public records the names of the individuals and the nature of the business.
The forms are available in the Clerk’s office; and there is a one-time registration fee of $10 for registering your official business name with the Town Clerk.