"In general, when a person acts and contracts avowedly as an agenl of another, who is known as the principal, his acts and contracts, within the scope of his authority, are considered the acts and contracts of the principal, and involve no personal liability on the part of the agent."1
While the contracts of an authorized agent acting on behalf of a known principal do not impose a personal liability upon the agent, yet an agent, though he be known to be such, may pledge his personal credit, for the party with whom he contracts may require it, and he himself may see fit to assume the obligation.2
"Whenever a party undertakes to do any act as the agent of another, if he does not possess any authority from the principal therefor, or if he exceeds the authority delegated to him, he will be personally liable to the person with whom he is dealing for or on account of his principal."3
"The rule as laid down by the great weight of authority, seems to be that where an agent undertakes to act for a principal without authority, or exceeds his authority, even though he in good faith, but erroneously, believes he has authority to act, he is responsible to the other contracting party for the damage he may sustain because of such want of authority."4
1Roach v. Rutter, 105 Pac. (Mont.) 555 (1909).
2 Joms v. Gould, 200 N. Y. 18; 92 N. E. 1071 (1910).
3Roach v. Rutter, supra; kroecrcr v. Pitcairn, 101 Pa. 311; 47 Am. Kep. 718; Feeter v Heath 11 Wend. (N. Y.) 479; Charles v. F.schleman, 5 Colo. 107; Roberts v. Button, 14 Vt. 195; Meech v. Smith, 7 Wend. (N. Y.) 315; Myers T. Co. v. Keelev 58 Mo App. 491; Lewis v. Reed, 11 Ind. 239; Dale v. Donaldson L. Co., 48 Ark. 188; 2 S. W. 703; 3 Am. St. Rep. 224; Lawson v. Cobban, 38 Mont. 138; 99 Pac. 128.
4 Roberta v. Tuttle, 105 Pac. (Utah) 916 (1909).