Tax lien due diligence checklist for certificate buyers

This tax lien due diligence checklist is for buying a tax lien certificate. It is not legal advice, and it is not a bid formula. The federal sources at the end were reviewed on September 25, 2026. State redemption periods, interest, and sale procedures are not restated here. Read the state page, then the county sale notice, before you treat any date as real.

OCC Bulletin 2004-39 describes a tax lien certificate, in many states, as a transfer of the taxing authority right to collect delinquent property taxes and to foreclose. The same bulletin says the laws on redemption and transfer vary among states and municipalities. A certificate is a claim. A tax deed purchase is a different transaction: you are asking what interest in the land the deed would convey. Use the records below for both, and do not copy a certificate conclusion onto a deed sale.

How to use this checklist

Every check has four parts. The question is what you still do not know. The record and the office are where that answer lives. The evidence to save is the source URL, the retrieval date, and the document or certificate number when one is printed. The outcome is pass, fail, or unresolved. A missing value is an unresolved check, not a clean result. Do not substitute the date you saved a file for the date the county published it.

• State rules on the education pages
• County coverage and sources
• Why undated county data breaks later
• Tax lien software
• How an evidence pack is organized
• A hypothetical certificate from list to bid review

How to research tax lien properties

Research the property the certificate attaches to, then research the sale you would have to join. Start with the sale list, open the same parcel on the assessor or appraiser map, and only then read value, access, environmental flags, recorded interests, bankruptcy, and the dates printed on the notice. A geographic directory is not a current auction list. If the official page will not open, the check stays unresolved.

Identify the parcel

Does the sale list name one parcel?

• Question: Does the certificate listing identify one parcel you can open on the assessor or appraiser map?
• Record and office: the tax collector or auction listing, then the assessor or appraiser GIS and property record.
• Evidence to save: the listing URL, the retrieval date, the parcel identifier, and any certificate or document number printed on the list.
• Outcome: Pass when that identifier opens the same parcel on the assessor map. Fail when the list and the map name different parcels. Unresolved when the list has no parcel identifier or the map will not open.

Is the sale a certificate or a deed?

• Question: What interest does this notice say is being sold?
• Record and office: the county sale notice from the tax collector, and the clerk of court when that office publishes the sale.
• Evidence to save: the notice URL, the retrieval date, and the words the notice uses for the interest being sold.
• Outcome: Pass when the notice says you are buying a tax lien certificate or the equivalent local name for that claim. Fail when you wanted a certificate and the notice says the sale conveys a deed. Unresolved when the notice does not name the interest. Keep certificate, deed, and county-held research separate.

Value and use

What use and assessed value does the assessor show?

The assessed figure is the number on the tax roll. It is not a market appraisal. OCC Bulletin 2004-39 tells national banks that tax assessment valuations do not meet the appraisal standards in 12 CFR part 34. This checklist does not offer a percent of value, or any other bid cap.

• Question: What use and assessed value does the assessor or appraiser show, and for which tax year?
• Record and office: the assessor or appraiser property record.
• Evidence to save: the record URL, the retrieval date, the tax year, the use or property-class code, and the assessed amounts as printed.
• Outcome: Pass when the record opens and the use is one you are willing to underwrite. Fail when the use is one you will not buy. Unresolved when the card is missing or the tax year is not shown.

Which tax years does the collector show?

OCC Bulletin 2004-39 names subsequent tax liens as an operational risk for banks that hold certificates. The bulletin does not say a later year wipes out an earlier certificate. Reconcile the years. Do not invent a priority rule to close the gap.

• Question: Which tax years and amounts does the collector show for this parcel, and do they match the sale list?
• Record and office: the tax collector account for the parcel.
• Evidence to save: the account URL, the retrieval date, and the years and amounts as printed.
• Outcome: Pass when the account and the sale list name the same years and amounts. Fail when they conflict and you cannot reconcile them from the two records. Unresolved when the account does not show the years.

Access and condition

Can you document how the parcel is reached and what is on it?

OCC Bulletin 2004-39 tells national banks to know the condition of the property and whether anything will increase or decrease its value, including environmental issues. A desk review that never opens an image, a plat, or a code file is unresolved on condition. This article does not require a site visit, and it does not treat a skipped visit as a pass.

• Question: How is the parcel reached, and what improvements or violations can you document?
• Record and office: the assessor or appraiser GIS and aerial, the recorded plat at the recorder, and code enforcement for open cases. Call the HOA only when a subdivision is shown, and ask what document supports any balance.
• Evidence to save: the map or plat URL, the retrieval date, the image date if one is printed, any code-case number, and the HOA document number if a lien was recorded.
• Outcome: Pass when you can document access and you have saved a current image or a site note you accept. Fail when you can document that there is no legal access, or when code enforcement shows an open order you will not accept. Unresolved when imagery, the plat, or the code file is missing. A phone balance with no document is unresolved.

Environmental

What flood map does FEMA return?

The FEMA Flood Map Service Center is the official public source for flood hazard information produced in support of the National Flood Insurance Program. FEMA says maps are updated and a copy you download can be superseded. The map is the hazard product. It is not, by itself, a statement that you must buy insurance.

• Question: Which flood-hazard product does FEMA return for this address or coordinate?
• Record and office: the FEMA Flood Map Service Center.
• Evidence to save: the address or coordinate you searched, the retrieval date, the map panel or FIRMette, and the effective date printed on that product.
• Outcome: Pass when the lookup returns a map and you have saved it, including a zone you are willing to accept. Fail only when the printed zone breaks a limit you set before the search. Unresolved when the address returns no map or the product is not effective.

Does an EPA Superfund search list this place?

EPA publishes Search for Superfund Sites Where You Live, with a National Priorities List and Superfund Alternative Approach lookup, a map, an advanced search of active and archived sites, and Cleanups in My Community. A search that lists nothing is not a finding that no hazardous substance was released. Under 42 U.S.C. § 9607(a), the current owner and operator of a facility, and a person who owned or operated it when a hazardous substance was disposed of, can be liable for specified response costs, subject to the defenses in subsection (b). Buying a certificate is not the same as taking title. OCC Bulletin 2004-39 says a national bank may buy a certificate only when state or local law confirms the certificate is a security interest in the property, not title to it. If a later deed or foreclosure would make you an owner, read § 9607 with counsel before you treat the property as clean.

• Question: Does the EPA Superfund search list a site at this parcel, and does the assessor use code give you a reason to look further?
• Record and office: the EPA Superfund search. Use the assessor use code only as a prompt, not as a contamination finding.
• Evidence to save: the search criteria, the retrieval date, and the result page. Save the assessor record you already pulled for value and use.
• Outcome: Pass when you have saved a search that does not list this place and you have no contrary local record. Fail when a listed site is a risk you will not take. Unresolved when the search errors, the address does not match the parcel, or the use code gives you a reason to look and you have not looked.

Title and competing liens

OCC Bulletin 2004-39 describes a tax lien as having priority over existing non-tax liens, including first mortgages, and in the same background section says the laws governing redemption and transfer vary among states and municipalities. Do not use that sentence as the result for your county. Other recorded interests depend on the state rule and the sale terms. There is no national list of what survives.

A filed federal tax lien is governed by a separate statute. Under 26 U.S.C. § 7425(b), a nonjudicial sale under a statutory lien of property on which the United States has a lien under the Internal Revenue Code is made subject to that federal lien if notice of the federal lien was filed more than 30 days before the sale and the United States is not given the notice in subsection (c)(1). The sale can have the discharge effect of local law if the federal lien was not filed in time, local law has no filing office, or notice of the sale is given under (c)(1). That notice is written notice to the Secretary, by registered or certified mail or personal service, not less than 25 days before the sale. When a sale of real property to which subsection (b) applies satisfies a lien prior to the United States, § 7425(d) lets the Secretary redeem within 120 days from the sale or the local redemption period, whichever is longer. If the recorder index shows a federal tax lien, treat that as its own check.

What has the recorder indexed?

• Question: Which documents are indexed against this owner and this parcel, and which of them are you willing to sit behind if the sale does not cut them off?
• Record and office: the county recorder, or the clerk of court where that office keeps the land records. Search by name and by parcel when the index allows.
• Evidence to save: the search criteria, the retrieval date, and the document number of each instrument you rely on. Save the sale notice that says, or does not say, what the sale cuts off.
• Outcome: Pass when the saved index and the documents you read match a risk you accept, and the sale terms are in the file. Fail when you find a recorded interest you will not accept and the sale terms do not say it is cut off. Unresolved when the index is down, a common name cannot be tied to this owner, or the sale terms are silent.

Bankruptcy

Under 11 U.S.C. § 362(a), a petition filed under section 301, 302, or 303 operates as a stay of listed acts, except as subsection (b) provides. The listed acts include an act to create, perfect, or enforce a lien against property of the estate, and an act to collect a claim that arose before the case. Subsection (b)(18) excepts the creation or perfection of a statutory lien for an ad valorem property tax that comes due after the petition. That exception does not say a sale to enforce an earlier lien may proceed. Subsection (d) lets the court grant relief from the stay after notice and a hearing. PACER is the electronic public access service for federal court records. Its own pages say a search that misses a case should be tried again in the PACER Case Locator, then with the court where you think the case was filed. PACER also publishes an access fee; read the fee schedule when you open an account.

Is there a federal bankruptcy case for this owner?

• Question: Does PACER show an open bankruptcy for the owner on the sale list?
• Record and office: PACER, searched in the federal court or the nationwide index. A clerk of court docket is a local hint, not a substitute for the federal search.
• Evidence to save: the party name you searched, the retrieval date, and the case number if one matches. Save the page that says there was no match.
• Outcome: Pass when the saved search has no case you can tie to this owner. Fail when an open case matches this owner and counsel has not told you the stay is inapplicable or has been lifted. Unresolved when the name is common, the search was not run, or a case exists and you have not read whether subsection (b) or a court order changes the answer.

Redemption and deadlines

Do not import a redemption period from another state or from a national summary. OCC Bulletin 2004-39, writing about bank liquidity, says the period in which the taxpayer can bring taxes current may be as long as five years. That sentence is not your county period. The education pages collect the state rules and the official sources behind them. An absent period on the notice is unresolved, not a finding that nobody can redeem.

What dates does the sale notice actually print?

• Question: Which dates does this notice print for the sale, registration, and any redemption right, and which state rule do those dates come from?
• Record and office: the county sale notice, then the state education page and the statute it cites.
• Evidence to save: the notice URL, the retrieval date, every date printed on the notice, and the statute link you opened.
• Outcome: Pass when the notice states the dates for this sale and you have read the state rule those dates come from. Fail when the notice says a step you still need, such as registration, is already closed. Unresolved when the notice prints no redemption period or you have not opened the state rule.

• Open the state education pages

Sale terms and registration

Can you participate, and who takes the bid?

An exported file does not submit a bid or replace the auction platform registration and payment process. Confirm the host, the deposit, and the payment instructions on the official page.

• Question: What do the sale instructions require before a bid is accepted, and which office or platform receives it?
• Record and office: the tax collector sale instructions and the auction platform those instructions name.
• Evidence to save: the instructions URL, the retrieval date, and the registration, deposit, payment, and bid-format terms as printed.
• Outcome: Pass when you are registered, or the instructions say no preregistration is required, and the page is saved. Fail when the instructions say registration is closed. Unresolved when the instructions are missing.

Go, no-go, and the record you keep

Go only when every check you are relying on is pass, and every check you did not finish is written down as unresolved for a reason you accept. No-go when any check is fail, or when an unresolved check is one you need in order to know what you are buying. Parcel identity, sale type, and an unanswered bankruptcy stay are in that group. There is no score that replaces a missing record.

Keep the source URL, the retrieval date, the document or certificate number, the pass, fail, or unresolved mark, and the name of the person who accepted it. In Accrella, use the Watchlist to review that diligence and edit the bid strategy, and record assumptions and approval separately. Accrella gates the bid-sheet export on diligence and strategy approval. The export is a file for the county format. It does not register you, pay the deposit, or submit the bid.

• See the research and bid-review workflow
• See how a retained evidence record is organized

Checklist table

Use the table as the index. The sections above are the standard for what counts as pass, fail, or unresolved. If a cell and a section disagree, follow the section and the record you saved.

Tax deed due diligence is a different question

Tax deed due diligence uses the same offices and asks something else. A certificate buyer is buying the taxing authority claim for delinquent taxes, and still has to learn whether the owner can pay it and what happens if they do not. A deed buyer is asking what interest in the land the deed would convey and which recorded interests it would not cut off. That answer is in the state statute and the sale terms, read against the recorder index. It is not in a national surviving-lien list. If the notice says deed, keep this checklist as the property research and answer the title question separately.

Questions investors ask

What should I check before buying a tax lien certificate?

Confirm the parcel, the sale type, the assessor use and tax year, the collector years, access and condition, the FEMA map, the EPA Superfund search, the recorder index, PACER, the dates on the notice, and the registration rules. Save the URL, the retrieval date, and the document number. Mark each one pass, fail, or unresolved. Then decide. The table above is the short version.

Which liens can survive a tax sale?

It depends on the state and on whether the sale is a certificate or a deed. For a federal tax lien, 26 U.S.C. § 7425 can leave a nonjudicial sale subject to the United States when the notice rules are not met, and § 7425(d) gives the Secretary a redemption period of 120 days or the longer local period when that subsection applies. Other interests are a recorder question plus the state rule on the education pages. Do not rely on a list that claims to cover every county.

Can you lose money on a tax lien?

Yes, you can. OCC Bulletin 2004-39 treats a certificate as an interest in a delinquent tax obligation and says the credit risk is that the obligation will not be repaid. The same bulletin says certificates can tie funds up without interim cash flow. You can also pay for a listing and later find that the parcel, the access, or a federal lien is not what the list implied. Nothing here promises a return.

How long does tax lien due diligence take?

It takes as long as the records take to open and save. A parcel with a clean assessor card and a recorder index that will not load is not finished, because that index check is still unresolved. Stopping early does not make the work shorter. It leaves a named gap. No single duration fits every county portal.

Does bankruptcy affect a tax lien?

It can. A bankruptcy petition stays the acts listed in 11 U.S.C. § 362(a), including enforcement of a lien against property of the estate and collection of a prepetition claim, unless an exception in subsection (b) applies or the court grants relief. Search PACER before you assume the sale is stopped, and before you assume it is safe to join. If a case matches the owner, ask counsel.