Nunc pro tunc

Nunc pro tunc

Latin for “now for then”. A nunc pro tunc order, judgment or entry is made today but takes effect from an earlier date, so that the official record shows what actually happened at that time. Courts use it to correct clerical mistakes and omissions in the record, not to change what was decided or to create rights that did not exist.

It is pronounced roughly “nunk pro tunk”. You will meet the term in court orders, divorce decrees, bankruptcy and probate files and, less precisely, in contracts and board resolutions that are made “effective as of” an earlier date. This entry explains the term from a US and UK common law perspective.

What nunc pro tunc means

The phrase describes timing: the act is done now but counts for then. The classic situation is a gap between what a court decided and what the record says. A judge rules on 3 March, but the written judgment is not entered until 20 April, or it is entered with a wrong date or a typo in a party’s name. A nunc pro tunc entry fixes that, so the judgment is treated as entered on the date it should have been.

The key limit follows from the purpose. A nunc pro tunc order can only record something that already happened. It cannot:

• supply a decision the court never made,
• correct a legal error in the decision itself (that is a matter for an appeal or a motion to amend),
• revive a deadline that has already run, or
• create facts that did not exist on the earlier date.

The US Supreme Court restated this in Roman Catholic Archdiocese of San Juan v. Acevedo Feliciano (2020): nunc pro tunc orders exist to reflect the reality of what has already occurred, not to create “facts” that never occurred. The court that issued the earlier orders had lost jurisdiction at the time, and a later nunc pro tunc order could not fix that.

How a nunc pro tunc order works

1. The gap is found. A party, the clerk or the court notices that the record does not match what happened: a missing entry, a wrong date, a clerical error in an order.
2. A motion or the court’s own initiative. A party files a motion for a nunc pro tunc order, or the court acts sua sponte, on its own motion.
3. Evidence of what happened. The court needs something in the file (minutes, a transcript, a signed but unfiled order) showing what was actually decided and when.
4. The order is entered. The new order states that it is entered nunc pro tunc as of the earlier date. From then on, the earlier date counts for the purposes the order covers.

Typical uses

Divorce decrees

The best-known use. Sometimes a divorce is decided but the final judgment is never entered, often because nobody filed the last form. If one of the former spouses has remarried in the meantime, the second marriage looks invalid. A nunc pro tunc judgment backdates the divorce to when it could have been entered, which protects the later marriage. California, for example, allows this in Family Code § 2346 where the judgment was not entered through mistake, negligence or inadvertence, and limits how far back the date can go.

Clerical errors in judgments and orders

Wrong dates, misspelled names, a transposed figure, an order signed but never filed. Nunc pro tunc entries are the standard tool for correcting the record so it matches the decision the court actually made.

Death of a party before judgment is entered

If a case has been heard and decided but a party dies before the judgment is formally entered, many courts enter the judgment nunc pro tunc as of the date of the decision, so the case does not have to start again.

Bankruptcy and probate

Bankruptcy courts have used nunc pro tunc orders to approve the retention of lawyers or accountants as of the date they started work. Since 2020, courts have become more careful with such orders and often prefer to describe the relief more precisely.

Contracts and corporate resolutions

Outside court, “nunc pro tunc” is used loosely for agreements and resolutions with retroactive effect, for example “This Amendment is made on 15 March 2026 and takes effect nunc pro tunc as of 1 January 2026”, or a board resolution that ratifies an officer’s past act. Between the parties, this works the same way as any retroactive effective date: they agree that their terms apply from the earlier date. It does not bind third parties, change tax treatment or make a filing that was late on time.

Nunc pro tunc vs backdating

Both point to an earlier date, which is why they get confused. The difference is honesty about when the document was created.

A practical rule for contracts: write “made on [actual date], effective as of [earlier date]” and never change the date next to the signatures. The effective date entry has sample clauses and more detail on what retroactive dates can and cannot do.

Example: an amendment that catches up with reality

A supplier and a customer agree in a call on 5 January to raise a service fee from 1 January. Both act on it: the supplier invoices the new fee, the customer pays it. The written amendment is only signed on 12 February.

A clean amendment says it is made on 12 February and takes effect as of 1 January. That matches what both sides have already done, and the January invoice is covered. What the amendment cannot do is change a notice that was due under the old terms in January, or make the customer’s auditor treat the document as if it existed in January.

Related and confused terms

• Ab initio: “from the beginning”. A contract that is void ab initio is treated as never having existed. Nunc pro tunc corrects the timing of something valid.
• Ex post facto: “after the fact”. Mostly used for laws that punish conduct retroactively, which many constitutions forbid. It is not a correction tool.
• Ratification: approving an act after the event, for example a company approving a contract an employee signed without authority. Ratification often works retroactively and is sometimes described as nunc pro tunc.
• Effective date: the day a contract’s terms start to bind the parties. A retroactive effective date is the contract-law cousin of nunc pro tunc.

Keeping dates straight in contract management

Most nunc pro tunc problems in contracts start with paperwork that lags behind the deal. Two habits prevent them: record the signing date and the effective date as separate fields, and keep a record of when each version was created and signed. In fynk, the audit trail logs every view, edit and signature automatically, and contract dates such as start, end and renewal dates are tracked as structured data with reminders, so a later reader can see which date is which.

Frequently asked questions

• What does nunc pro tunc mean?

  Nunc pro tunc is Latin for 'now for then'. It describes an order, judgment or entry made today that takes effect from an earlier date, so the record shows what actually happened at that time.

• What is a nunc pro tunc order?

  A court order that corrects the record retroactively. It is used when a decision was made but not recorded, or recorded with a clerical error. It can only reflect what really happened earlier. It cannot add a decision the court never made or fix a legal error in the decision.

• Is nunc pro tunc the same as backdating?

  No. Nunc pro tunc openly shows that the document was made later and applies from an earlier date to reflect reality. Improper backdating hides the real date to make it look as if a document existed earlier, which can amount to fraud.

• What is a nunc pro tunc divorce judgment?

  A divorce judgment entered retroactively, as of the date it could have been entered, because it was not entered at the time through mistake or oversight. It is often used to protect a later marriage of one of the former spouses. Whether and how far back it is available depends on the state.

• Can a contract be made nunc pro tunc?

  Parties can agree that a contract or amendment applies from an earlier date, and some drafters use the words nunc pro tunc for this. It binds only the parties, should state both the actual signing date and the earlier effective date, and cannot undo missed deadlines or affect the rights of third parties.