-17- Neidringhaus v. Commissioner, 99 T.C. 202, 219 (1992). In addition, petitioners argue that a good friend of Mrs. Paterson “loaned” her $50,000 because the memo notation on the check said “loan-taxes.” Petitioners did not have the friend testify or produce any documentation regarding this “loan.” The failure of a party to introduce evidence which, if true, would be favorable to that party gives rise to the presumption that the evidence would be unfavorable if produced. Wichita Terminal Elevator Co. v. Commissioner, 6 T.C. 1158, 1165 (1946), affd. 162 F.2d 513 (10th Cir. 1947). Petitioners have not proven that any of these items are nontaxable deposits or are loans. Petitioners have also introduced no evidence to support that Mrs. Paterson is entitled to any additional expenses or losses. In sum, we find that Mrs. Paterson had unreported income in the amounts respondent determined in the deficiency notice. II. Fraud Penalty We next consider whether either petitioner is liable for the fraud penalty for the years at issue. The Commissioner must prove by clear and convincing evidence that the taxpayer underpaid his or her income tax and that some part of the underpayment was due to fraud. Sec. 6663(a); Clayton v. Commissioner, 102 T.C. at 646. If the Commissioner establishes that any portion of an underpayment is attributable to fraud, the entire underpayment is treated as attributable to fraud, except to the extent the taxpayer establishes by a preponderance of thePage: Previous 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 NextLast modified: November 10, 2007