[¶ 1] County Forest Products, Inc. and Galen R. Porter Jr. appeal from the District Court’s (Dover-Foxcroft, Stitham, J.) judgment in favor of A.E. Robinson Oil Co., Inc. on A.E. Robinson’s complaint seeking payment on a fuel products account. Porter and County Forest challenge the trial court’s decision to hold them jointly and severally liable for the debt as well as its award of financing charges and attorney fees. We modify the judgment to remove the award of attorney fees and affirm as modified.
I. BACKGROUND
[¶ 2] We present the evidence and the trial court’s findings in the light most favorable to A.E. Robinson as the prevailing party.
See Lyman v. Huber,
[¶ 3] Several types of writings confirmed these oral agreements. Within two days after A.E. Robinson delivered its products, it mailed invoices directed to Porter Cash Fuel. A.E. Robinson also regularly sent Porter Cash Fuel statements of account. Further, an authorization for direct payment listed “Porter Cash Fuel” and bore two signatures, one of which belonged to Porter. None of the writings made any reference to County Forest and none indicated the corporate status of Porter Cash Fuel. All of A.E. Robinson’s dealings were with Porter or with Porter Cash Fuel; it had no reason to believe it was dealing with County Forest.
[¶ 4] Over the years of this business relationship, A.E. Robinson added terms to the bottom of its invoices asserting its entitlement to financing charges, collection costs, attorney fees, and court costs. Although Porter never expressly agreed to these terms, when Porter paid sporadically, some of the payments were applied to financing charges, and Porter never complained. Ultimately, the business relationship deteriorated, and A.E. Robinson refused to deliver any more products. A.E. Robinson sued County Forest and Porter seeking payment on the account. Following a non-jury trial, the court entered judgment for A.E. Robinson jointly and severally against County Forest and Porter in the amount of the invoices plus financing charges and attorney fees. County Forest and Porter appeal from the entry of that judgment.
II. DISCUSSION
[¶ 5] First, County Forest and Porter contend that the trial court erred in holding them jointly and severally liable for the debt. Porter testified at trial that he intended to operate Porter Cash Fuel as a trade name of County Forest, and he did not establish a separate sole proprietorship unrelated to County Forest. By operating under an unregistered assumed or trade name, Porter violated Maine corporation law. See 13-C M.R.S. §§ 204, 404(6) (2011).
[¶ 6] Porter became personally liable, as did County Forest, based on principles of agency. In his transactions with A.E. Robinson, Porter, through Porter Cash Fuel, was acting as an agent for an undisclosed principal — County Forest. The Restatement (Third) of Agency, which we cited with approval in
Treadwell v. J.D. Construction Co.,
[¶ 7] Here, Porter testified that he intended to operate Porter Cash Fuel as a trade name of County Forest. His brief to this Court reiterates that this was his intent. This testimony establishes that he was not operating Porter Cash Fuel as a separate sole proprietorship, which might have permitted County Forest to escape liability. Because Porter operated Porter Cash Fuel as an agent for County Forest without disclosing that County Forest was the principal, he and County Forest are parties to the contract.
See
Restatement (Third) of Agency § 6.03. This result is
[¶ 8] Our cases from an earlier era endorsed the election rule, which requires a third-party to elect between the principal and the agent in obtaining relief.
See, e.g., Libby v. Long,
[¶ 9] Second, County Forest and Porter assert that the trial court erred in interpreting section 2-207 when it enforced the financing charges and attorney fees clauses added to A.E. Robinson’s invoices over the course of the business relationship. We review the trial court’s interpretation of a statute de novo.
Bonney v. Stephens Mem’l Hosp.,
[¶ 10] Here, the court correctly awarded financing charges to A.E. Robinson because within the meaning of section 2-207(2)(b), the addition of a financing charge does not materially alter an oral agreement between merchants.
See
U.C.C. § 2-207 cmt. 5, 11 M.R.S.A. § 2-207. In addition, the course of performance followed by these parties included the payment of financing charges. A provision requiring payment of attorney fees in the event of a breach, however, does materially alter an oral agreement unless such charges are consistent with trade usage or the parties’ course of performance.
See
The entry is:
Judgment modified to remove the award of attorney fees. As modified, judgment affirmed.
Notes
. G.R. Porter & Sons was named as a defendant in this case, but the trial court granted its unopposed motion to dismiss it from the case prior to trial.
. We do not reach the parties’ arguments regarding the trial court’s interpretation of their stipulations at trial because, on the facts of this case, County Forest and Porter are jointly and severally liable as a matter of law.
. We acknowledge a line of cases holding that materiality is a question of fact.
See, e.g., Am. Ins. Co. v. El Paso Pipe & Supply Co.,
