This is a suit for damages under the RICO statute. 18 U.S.C. §§ 1961 et seq. The plaintiff, Verna Emery, charges the defendant, American General Finance, a maker of small loans, with engaging in the practice of “loan flipping,” a practice that the plaintiff claims is “racketeering activity” within the meaning of RICO. § 1962(c). To be such, it must involve one or more of the crimes listed in section 1961(1), among which (see § 1961(1)(B)), and the only one alleged by the complaint, is mail fraud, prohibited by 18 U.S.C. § 1341. The district judge dismissed the complaint under Fed.R.Civ.P. 12(b)(6) on the ground that the facts alleged do not violate section 1341.
Here is what is alleged. On July 14,1992, Emery borrowed $1,983.81 from American General Finance, the loan being secured by miscellaneous personal property, including a typewriter and a television set. The finance charge, based on the 36 percent annual rate of interest charged for the loan, was $1,327.08, and the loan was for three years. Six months later, American General Finance wrote a letter to Emery. The letter, signed by a branch manager, reads as follows:
Dear Verna:
I have extra spending money for you.
Does your car need a tune-up? Want to take a trip? Or, do you just want to pay off some of your bills? We can lend you money for whatever you need or want.
You’re a good customer. To thank you for your business, I’ve set aside $750.00 * in your name.
Just bring the coupon below into my office and if you qualify, we could write your check on the spot. Or, call ahead and I’ll have the check waiting for you.
Make this month great with extra cash. Call me today — I have money to loan.
At the bottom of the letter is a coupon captioned “$750.00 Cash Coupon” made out to Verna M. Emery at her address. Her name and address are preceded by the words “$750.00 cash for:”. Small print explains at the bottom, “This is not a check.”
Emery wanted a loan, so she responded to the letter. When she showed up in the branch manager’s office, he gave her forms for a refinancing of her existing loan with additional funds advanced. The new note which she signed was for an amount financed of $2,399.83 and a finance charge (computed at the same 36 percent interest rate) of ' $1,641.28, payable over three years. The monthly payment, which had been $89.47 under the original loan, jumped to $108.20 *1346(more for the first payment) for the new loan. Had she not refinanced she would have had to pay $89.47 a month for another 80 months or so (for the refinancing took place approximately six months after the original loan was made), while with the refinancing she had to pay $108.20 for the next 36 months — and this to receive $200. The increment in cost to her came to about $1,200, paid over three years, and this is for the right to get only $200 now. The cost to her of borrowing $200 in this way was roughly three times as great as it would have been had she borrowed that amount for three years in a separate loan at the annual interest rate of 36 percent. By our calculation, the implicit interest rate that she paid for the $200 loan exceeded 110 percent per annum. This was not disclosed on the Truth in Lending Act form that Emery received because the Act treats the transaction as a reborrow-ing of the original amount of the loan plus $200. So much for the Truth in Lending Act as a protection for borrowers.
We have said that $200 was Emery’s benefit from the loan, but the figure may be larger. The difference between the amount financed by the new loan and the amount financed by the old is more than $400. The only cash she received was a check for $200, the rest of the difference being eaten up by increased insurance and other expenses. Perhaps those expenses inured to her benefit. If so the. implicit interest rate would be less than 110 percent. These are not details that can be or have to be resolved at the complaint stage.
The complaint alleges, a little less clearly than could be desired but clearly enough, that while the letter sent to Emery and other customers of American General Finance implies that the customer is being offered a separate loan, when the customer shows up to take advantage of the offer the company presents him with papers for refinancing the customer’s existing loan with additional funds being advanced and does not disclose, indeed conceals the fact, that this method of obtaining additional funds is much more costly than taking out a new loan. The customers do not understand this, because American General Finance “markets its loans to working-class borrowers who generally do not understand ... the computations necessary to determine the comparative cost” of a second loan and a refinancing (with additional funds advanced) of their existing loan. This practice is alleged to be a “scheme or artifice to defraud,” and one who having devised such a scheme or artifice uses the mails “for the purpose of executing such scheme or artifice or attempts ing so to do” violates the mail fraud statute.
The language of the mail-fraud statute is very broad, and concern has repeatedly been expressed that it not be given too vague and encompassing a scope by judicial interpretation. E.g., United States v. Dial, 757 F.2d 163, 170 (7th Cir.1985); United States v. McNeive, 536 F.2d 1245, 1252 (8th Cir.1976); United States v. Margiotta, 688 F.2d 108, 139-40 (2d Cir.1982) (Winter, J., concurring and dissenting); cf. United States v. Goodman, 984 F.2d 235, 239 and n. 7 (8th Cir.1993). Since it is a purely criminal statute, unlike statutes such as the Sherman Act that authorize both civil and criminal remedies and are interpreted more liberally in cases where only the former are sought, United States v. United States Gypsum Co., 438 U.S. 422, 436-43, 98 S.Ct. 2864, 2873-76, 57 L.Ed.2d 854 (1978), if a narrow interpretation is appropriate to meet the concern with breadth and vagueness it would have to apply to the invocation of the statute in this civil suit.
Consistent with this concern, recent cases, at least, make clear that all the statute punishes is deliberate fraud, United States v. Dunn, 961 F.2d 648, 650 (7th Cir.1992); United States v. Stewart, 872 F.2d 957, 959 (10th Cir.1989), where in order to get money or something else of monetizable value from someone you make a statement to him that you know to be false, or a half truth that you know to be misleading, expecting him to act upon it to your benefit and his detriment. Midwest Commerce Banking Co. v. Elkhart City Centre, 4 F.3d 521, 524 (7th Cir.1993); Rubinstein v. Collins, 20 F.3d 160, 172 n. 53 (5th Cir.1994). We emphasize the “half truth” half of this definition. United States v. Keplinger, 776 F.2d 678, 697 (7th Cir.1985), holds “that omissions or concealment of material information can constitute fraud
*1347... cognizable under the mail fraud statute, without proof of a duty to disclose the information pursuant to a specific statute or regulation.” In that ease a laboratory had omitted from a report on the toxicity of a drug an opinion by a consultant that the drug had some toxic effects, and we held that the jury was entitled to find that this omission was fraudulent, given the impression, conveyed by the report, of the utter harmlessness of the drug. Plenty of cases say that “merely failure to disclose” is not, without more, mail fraud, e.g., Reynolds v. East Dyer Development Co., 882 F.2d 1249, 1252 (7th Cir.1989), and we certainly have no quarrel with this proposition. Whether a failure to disclose is fraudulent depends on context, United States v. Biesiadecki, 933 F.2d 539, 542-43 (7th Cir.1991), to which we now turn.
We do not of course know the state of mind of the employees of American General Finance who drafted the letter to Emery and its other customers; nor can the plaintiff have more than an inkling until she has an opportunity to conduct pretrial discovery. But assume, as the complaint adequately invites us to do, that these employees, desiring to exploit the financial naiveté of working-class borrowers, realizing that these borrowers do not read Truth in Lending Act disclosure forms intelligently, and hoping to trick them into overpaying disastrously for credit, drafted a letter that they believed would be effective in concealing the costs of refinancing. Read against this background of nefarious purpose, the letter is seen to be replete with falsehoods and half truths. “Dear Verna ... You’re a good customer. To thank you for your business, I’ve set aside $750.00* in your name.” She is no “Dear Verna” to them; she has not been selected to receive the letter because she is a good customer, but because she belongs to a class of probably gullible customers for credit; the purpose of offering her more money is not to thank her for her business but to rip her off; nothing has been “set aside” for her. “[W]e could write your check on the spot. Or, call ahead and I’ll have the check waiting for you.” Yes—along with a few forms to sign whereby for only $1,200 payable over three years at an even higher monthly rate than your present loan (and than your present loan plus a separate loan for $200, which we could have made you), you can have a meager $200 now. We were not reassured when at the oral argument American General Finance’s lawyer was unable to tell us what it cost Verna Emery to obtain the $200 through a refinancing compared to what it would have cost her had the company simply made her a separate loan for that amount.
The district court thought the scheme saved from illegality by the plaintiff’s failure to allege either a violation of the Truth in Lending Act or a fiduciary relationship between the finance company and her. The points turn out to be related. A careful reader, comparing the Truth in Lending Act disclosure forms for the original loan to Emery and the refinaneing-plus-additional-ad-vance loan, would notice that the monthly payment was almost $20 a month higher under the second loan and by comparing the dates of the two forms would also realize that the second loan would require six more months of payments. But not all persons are capable of being careful readers. Suppose Emery were blind. Or retarded. Would anyone argue that shoving a Truth in Lending Act disclosure form in front of her face would be a defense to fraud? The allegation is that she belongs to a class of borrowers who are not competent interpreters of such forms and that the defendant knows this and sought to take advantage of it. Taking advantage of the vulnerable is a leitmotif of fraud. United States v. Newman, 965 F.2d 206, 211 (7th Cir.1992). Competent people can protect themselves well enough against most forms of fraud. The incompetent are for that reason a frequent target of con men and other defrauders, and such targeting is, of course, unlawful, and indeed earns the criminal a longer sentence. Id. at 211; United States v. Sutherland, 955 F.2d 25, 26 (7th Cir.1992); United States v. Leonard, 61 F.3d 1181, 1188 (5th Cir.1995).
The district court acknowledged that if the finance company had had a fiduciary relationship with Verna Emery, it would have been guilty of fraud had it failed to disclose so material a fact as that refinancing would be a much more costly method of *1348borrowing another $200 than borrowing it in a separate loan. A fiduciary must be as honest with the persons to whom he stands in a fiduciary relationship as he would want other people to be with him. Charter Oak Fire Ins. Co. v. Color Converting Industries Co., 45 F.3d 1170, 1175-76 (7th Cir.1995); Burdett v. Miller, 957 F.2d 1375, 1381 (7th Cir.1992). But it is not true that if you are not a fiduciary anything goes, short of false statements. A half truth, or what is usually the same thing a misleading omission, is actionable as fraud, including mail fraud if the mails are used to further it, if it is intended to induce a false belief and resulting action to the advantage of the misleader and the disadvantage of the misled. This is adequately alleged in the complaint.
We do not hold that “loan flipping” is fraud, because the boundaries of the term are obscure. We do not hold that American General Finance engaged in fraud, or even in “loan flipping.” We do not hold that the mail fraud statute criminalizes sleazy sales tactics, which abound in a free commercial society. State of mind is crucial in a case of criminal fraud, as we have emphasized, and there is no evidence as yet concerning the state of mind of the defendant’s relevant employees. We have no idea who composed the letter to Verna Emery or what the author had in mind when he composed it. All we know is that the allegations of fraud are sufficient to withstand a motion to dismiss the complaint for failure to state a claim. There is a state of facts consistent with the complaint that if proved would establish a violation of the mail fraud statute, and no more is required at this stage for the suit to continue. E.g., H.J. Inc. v. Northwestern Bell Tel. Co., 492 U.S. 229, 249-50, 109 S.Ct. 2893, 2905-06, 106 L.Ed.2d 195 (1989).
The defendant, however, advanced, and the plaintiff in her reply brief contested, several alternative grounds for upholding the dismissal of the suit. One of them is plainly meritorious. To prevail in a RICO case, the plaintiff must prove a “pattern of racketeering” consisting of at least two separate criminal acts. Where the acts are acts of fraud, the circumstances of each act must be pleaded with particularity. Fed. R.Civ.P. 9(b); Graue Mill Development Corp. v. Colonial Bank & Trust Co., 927 F.2d 988, 992 (7th Cir.1991); Lancaster Community Hospital v. Antelope Valley Hospital District, 940 F.2d 397, 405 (9th Cir.1991); New England Data Services, Inc. v. Becher, 829 F.2d 286, 290 (1st Cir.1987). The plaintiff pleaded with adequate particularity the fraud directed against her, but with regard to other customers of American General Finance alleged merely that the company did the same thing to them. There are no names or dates or other details of transactions involving any other customer besides Emery. These details would not be necessary to identify additional members of the plaintiff’s class, but are necessary to identify a violation of RICO, which requires (in this case) more than one fraud and only one is alleged to have been perpetrated against Emery herself.
The district judge was therefore right to dismiss the complaint. But had he done so on the basis of Rule 9(b), he would of course have given Emery a chance to amend her complaint to cure what appears to be a merely technical pleading deficiency. Devaney v. Chester, 813 F.2d 566, 569 (2d Cir.1987); Schreiber Distributing Co. v. Serv-Well Furniture Co., 806 F.2d 1393, 1401-02 (9th Cir.1986). The dismissal of the suit, as distinct from the complaint, was therefore premature, unless the defendant’s other grounds for affirming the judgment have merit. But as they are complicated, and the district judge has not considered them, we leave them for his consideration on remand.
REVERSED AND REMANDED.