Nonprofit Donor Acknowledgment Letters: What IRC 170 Requires and What Gets Donations Disallowed

The IRS has disallowed charitable deductions in court because the nonprofit’s acknowledgment letter was missing a single required sentence. In Durden v. Commissioner (T.C. Memo 2012-140), the Tax Court denied a $25,171 deduction because the church’s letter did not include the statement that “no goods or services were provided in exchange for the contribution.” The donors had the cancelled checks. They had the church’s letter. The letter said “thank you for your generous gift.” It did not say the magic words. The deduction was denied in full. This is not an edge case. The substantiation rules under IRC 170(f)(8) are mechanical, and the Tax Court has consistently held that substantial compliance is not good enough.

What must the acknowledgment letter include?

IRC 170(f)(8)(B) requires three elements. All three must appear in the same written acknowledgment.

Element 1: The amount of cash, or a description of non-cash property. For cash contributions, the letter must state the dollar amount. “Your generous gift” is not sufficient. “Your contribution of $5,000 on March 15, 2026” is sufficient. For non-cash property, the letter must describe the property (“one used Toyota Camry” or “100 shares of Apple Inc. common stock”) but must not state a value. The value is the donor’s responsibility to determine, not the organization’s. If the organization states a value for non-cash property, it is volunteering information it is not required to provide, and if the stated value differs from the donor’s claimed value, it creates a dispute.

Element 2: Whether the organization provided goods or services in consideration. The letter must affirmatively state one of two things: (a) “No goods or services were provided in exchange for your contribution,” or (b) a description and good-faith estimate of the value of goods or services provided. This is the element that trips up most organizations. A letter that thanks the donor for “your generous contribution” without addressing whether goods or services were provided is incomplete, even if the answer is “no.” The negative statement is required.

Element 3: If goods or services were provided, a description and good-faith estimate of value. If the donor received something in return (a dinner, a gift basket, event tickets, membership benefits), the letter must describe what was provided and estimate its fair market value. The donor’s deductible amount is the contribution minus the value of the benefit received (the “quid pro quo” reduction). If the only benefit was an “intangible religious benefit” (admission to religious ceremonies, religious counseling, prayer), the letter must state that the only benefit was an intangible religious benefit, and no value estimate is required.

When must the acknowledgment be sent?

The acknowledgment must be “contemporaneous,” which IRC 170(f)(8)(C) defines as received by the donor before the earlier of: (1) the date the donor files the tax return for the year of the contribution, or (2) the due date (including extensions) for that return. For a calendar-year individual filing by April 15, the acknowledgment must be received before April 15 (or before the actual filing date if the donor files early).

Most organizations send annual giving statements in January of the following year, covering all contributions for the prior year. This satisfies the timing requirement for all donors who have not already filed their returns. The January statement is the most common and most practical approach: one letter per donor per year, covering all contributions.

Each contribution of $250 or more requires its own substantiation (or coverage in a single annual statement that lists each contribution separately). A lump annual statement that says “total contributions: $3,600” without listing the individual contributions is not sufficient if any single contribution was $250 or more, because the donor cannot demonstrate that each individual contribution was substantiated.

What are the quid pro quo disclosure rules?

When a donor makes a payment of more than $75 and receives goods or services in return (a “quid pro quo contribution”), the organization must provide a written disclosure statement that: (1) informs the donor that the deductible amount is limited to the excess of the payment over the value of the goods or services, and (2) provides a good-faith estimate of the value of the goods or services.

This requirement is separate from the $250 acknowledgment requirement. It applies at the organizational level: the organization is required to provide the disclosure, and failure to do so is subject to a penalty of $10 per contribution, up to $5,000 per fundraising event or mailing, under IRC 6714.

Common quid pro quo situations: a charity gala where the ticket price is $500 but the dinner and entertainment value is $150 (the deductible amount is $350); a golf tournament with a $300 entry fee that includes $100 in golf and food (the deductible amount is $200); a membership that includes a quarterly magazine and discounted event tickets (the deductible amount is the membership fee minus the fair market value of the benefits).

Exceptions to the quid pro quo rules: token items (items with a cost basis of $13.10 or less for 2025, indexed annually) where the payment is at least $65.50; free, unordered low-cost articles (bookmarks, calendars, mugs); and intangible religious benefits.

How do non-cash donations work?

Non-cash donations add layers of complexity to the acknowledgment process:

Donations under $250. The donor needs a receipt from the organization showing: the organization’s name, the date of the contribution, and a description of the property. No value is required in the receipt.

Donations of $250-$499. The donor needs the standard contemporaneous written acknowledgment (the three-element letter described above). The organization describes the property but does not value it. The donor determines the fair market value for the deduction.

Donations of $500-$4,999. In addition to the acknowledgment letter, the donor must complete Section A of Form 8283 (Noncash Charitable Contributions) and attach it to the tax return. The donor reports the property description, date acquired, cost basis, fair market value, and method of valuation.

Donations of $5,000 or more (excluding publicly traded securities). The donor must obtain a qualified appraisal from a qualified appraiser, complete Section B of Form 8283, and have the donee organization sign Part V of Section B (acknowledging receipt of the property). The organization’s signature on Part V does not constitute agreement with the appraised value; it confirms receipt.

Publicly traded securities. No appraisal is required regardless of value, because the fair market value is determinable from published market data. The donor claims the fair market value on the date of contribution (average of high and low trading prices).

Vehicles, boats, and aircraft valued over $500. Special rules under IRC 170(f)(12) limit the deduction to the gross proceeds from the organization’s sale of the vehicle (unless the organization uses the vehicle in its programs or materially improves it). The organization must provide a Form 1098-C within 30 days of the sale (or within 30 days of the contribution if the organization will use the vehicle). The donor’s deduction is limited to the amount on the 1098-C.

What happens when the acknowledgment is wrong or missing?

The consequences fall on the donor, not the organization:

Missing acknowledgment. The donor’s deduction is denied. The Tax Court has been rigid on this point. In Durden, the deduction was denied because the letter lacked the goods-or-services statement. In Kunkel v. Commissioner (T.C. Memo 2015-8), a $60,000 deduction was denied for the same reason. The donor cannot substitute cancelled checks, bank statements, or the organization’s Form 990 for the written acknowledgment.

Late acknowledgment. If the acknowledgment is received after the donor files the return (and the return is filed before the due date), the deduction is technically unsupported. If the IRS examines the return and the acknowledgment was not in hand at filing, the deduction is at risk. An amended return with the late acknowledgment may resolve the issue, but the IRS is not required to accept it.

Incorrect value on non-cash acknowledgment. If the organization states a value for non-cash property and the IRS disagrees with the value, the dispute is between the IRS and the donor. The organization’s stated value is not binding. But if the organization signed Section B of Form 8283 and then sold the property for substantially less than the appraised value within three years, the organization must file Form 8282 (Donee Information Return) reporting the sale, which may trigger an IRS inquiry into the donor’s claimed value.

Penalty on the organization for quid pro quo failures. The $10-per-contribution penalty under IRC 6714 applies when the organization fails to provide the required quid pro quo disclosure. This is a penalty on the organization, not the donor.

What should I do next?

If your nonprofit sends donor acknowledgments that do not include the goods-or-services statement (element 2), fix the template immediately. If your annual giving statements list a lump total rather than itemizing contributions of $250 or more, restructure the statement. If your organization holds fundraising events with ticket prices above $75, implement the quid pro quo disclosure in the event marketing and in the post-event acknowledgment. If you accept non-cash donations valued at $5,000 or more, train your staff on the Form 8283 signing process.

• Nonprofit Form 990 filing guide, the annual return where the organization reports total contributions and donor-related information
• Nonprofit governance and conflict of interest, the board oversight that includes gift acceptance policies
• Church bookkeeping, the parallel donor acknowledgment requirements for churches (same IRC 170 rules, different organizational context)
• Fiscal sponsorship, how a fiscal sponsor issues donor acknowledgments on behalf of a project without its own 501(c)(3) status
• Nonprofit UBIT, the tax obligation when a fundraising activity crosses the line into unrelated business income
• IRS accuracy-related penalty, reasonable cause defense for donors whose deductions are challenged due to acknowledgment issues

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.