Letter 3210 is the decision letter issued at the close of an Equivalent Hearing. An Equivalent Hearing is what the IRS Office of Appeals conducts when a taxpayer requested a CDP hearing after the 30-day CDP window closed but within one year of the final notice. The procedural review is similar to a CDP hearing, but the outcome has materially different consequences.

Usually No Tax Court Review

Unlike Letter 3193 (CDP), Letter 3210 generally does not carry Tax Court petition rights. IRM 8.22.4.3 lists three exceptions. If your hearing involved innocent spouse relief under IRC Section 6015, interest abatement under IRC Section 6404(h), or a dispute over whether your CDP request was actually timely, you may be able to seek judicial review of that issue. Appeals uses Letter 4439 or Letter 4440 for the spousal relief and interest abatement versions, and those letters state the petition deadline. Check whether any of the three applies before you treat the decision as final.

There may be limited paths to challenge the underlying collection action in other forums (such as refund litigation after full payment, or federal district court for certain claims), but these are narrower and typically more expensive than Tax Court CDP review would have been.

Why This Matters

Filing a timely CDP request is often the single most important procedural step in a collection matter. Thirty days from the final notice preserves CDP rights with Tax Court review. Day 31 through 365 preserves only Equivalent Hearing rights. The difference between those two is the difference between judicial review and no judicial review.

If the Decision Is Unfavorable

If Letter 3210 denies the collection alternative you proposed, your options are to accept the determination and work within it, propose a different collection alternative directly to the collection function (installment agreement, offer in compromise, currently not collectible), or in some cases file a Collection Appeals Program (CAP) appeal on new or changed circumstances.

If you received Letter 3210 and want to understand your remaining options, call us at (813) 229-7100.