
171 Mich. App. 283 (1988)
429 N.W.2d 654
PETERS PRODUCTION, INC.
v.
DESNICK BROADCASTING COMPANY
Docket No. 98503.
Michigan Court of Appeals.
Decided September 7, 1988.
Goodman & Makinen (by Michael E. Makinen), for plaintiff.
Before: MAHER, P.J., and McDONALD and R.C. LIVO,[*] JJ.
R.C. LIVO, J.
Plaintiff, Peters Production, Inc., appeals the decision not to enforce a California judgment against defendant, Desnick Broadcasting Company. The trial court held that the California Superior Court's money judgment against defendant was not a valid judgment and not entitled to recognition and full faith and credit in the State of Michigan. We disagree and reverse.
On August 17, 1982, the parties entered into a contract under which plaintiff would provide the programming for defendant's FM radio station. On July 22, 1983, the parties entered into a second contract, under which plaintiff would provide the programming for defendant's AM radio station. In early 1984, defendant became delinquent in its payments to plaintiff for the subscription programming services. When the matter could not be resolved by the parties, plaintiff filed suit in the *285 California Superior Court for the County of San Diego.
At the June, 1985, trial, defendant was represented by California counsel, but presented no affirmative evidence. On June 19, 1985, the California Superior Court entered judgment against defendant in the amount of $15,035 plus costs of $2,595 and interest at ten percent per annum from July 1, 1984. Plaintiff filed the instant suit to have the California judgment enforced against defendant. The trial court ruled that "error and misrepresentation appear to have ... resulted in an incorrect judgment being entered," and that the California court was a "serious[ly] inconvenient forum." The trial court refused to recognize and enforce the California judgment.
The trial court in its opinion cited the Michigan Uniform Foreign Money Judgment Recognition Act, MCL 691.1151 et seq.; MSA 27.955(1) et seq. This statute has no application in the instant case. As the definition section states:
(a) "Foreign state" means any governmental unit other than the United States, or any state, district, commonwealth, territory, insular possession thereof, or the Panama canal zone, the trust territory of the Pacific islands or the Ryukyu islands. [MCL 691.1151(a); MSA 27.955(1)(a).]
The instant case requires application of the full faith and credit clause of the United States Constitution, as our Supreme Court has stated:
Section 1, art 4, Constitution of the United States, provides:
"Full faith and credit shall be given in each State to the public acts, records and judicial proceedings of every other State. And the congress may by general laws prescribe the manner in *286 which such acts, records, and proceedings shall be proved, and the effect thereof."
No valid judgment may be rendered in the courts of any State without due process of law, or without jurisdiction; but in those cases where the court has jurisdiction of the subject-matter and of the parties, the effect of the legislation of congress (28 USC 687) is that the judgment of another State shall be record evidence of the demand, and that defendant, when sued on a judgment, cannot go behind it and controvert the contract or other cause of action on which the judgment was founded. It is evidence of an established demand which, standing alone, is conclusive between the parties to it. Bank of State of Alabama v Dalton, 50 US (9 How) 522, 528; 13 L Ed 2d 242 (1850). [Ward v Hunter Machinery Co, 263 Mich 445, 452; 248 NW 864 (1933).]
A Michigan court may not consider a collateral attack against the obligation underlying the judgment of a court of a sister state since the judgment has replaced and extinguished that obligation. McPheron, Inc v Koning, 125 Mich App 325, 328; 336 NW2d 474 (1983).
In the case at bar, the trial court ruled that personal jurisdiction and subject-matter jurisdiction were proper in the California Superior Court. At that point, the California judgment should have been enforced. The trial court refused to enforce the judgment because of an alleged error and the allegation that the California court was an inconvenient forum. These rulings go to the merits of the case and should not have been considered once it was found that the California court had proper jurisdiction. We find that the trial court erred by not enforcing the California judgment and not granting a verdict in favor of plaintiff. This case is reversed and remanded for the trial court to enter a judgment in favor of plaintiff.
*287 We note that defendant was represented below and on appeal by Harvey L. Desnick, who is not a licensed attorney. An individual may appear in propria persona; a corporation, however, can appear only by attorney regardless of whether it is interested in its own corporate capacity or in a fiduciary capacity. Detroit Bar Ass'n v Union Guardian Trust Co, 282 Mich 707, 711; 281 NW 432 (1938). Therefore, this Court on its own motion strikes defendant's appellate brief from the record on appeal. MCR 7.212(H).
This case is reversed and remanded for entry of judgment in favor of plaintiff.
NOTES
[*]  Circuit judge, sitting on the Court of Appeals by assignment.
