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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Use the Income Tax Department’s pre-login “Authenticate Notice / Order issued by ITD” service, then keep the order date, service date and the date you actually received or accessed the document as separate entries. The service lets registered and unregistered users search with PAN and document details or with a document identification number (DIN) and mobile number. Authenticate the document first; only then use the dates in a chronology or deadline calculation.
An authentication result shows that the Department’s record corresponds to the document details you entered. It does not, by itself, decide whether the reassessment was within limitation, whether service was legally effective, or whether the assessment is correct on the merits.
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What date are you trying to verify?
A reassessment order can have several relevant dates. Treating them as interchangeable is a common cause of incorrect timelines and missed objections.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches| Date | Meaning | How to record it |
|---|---|---|
| Order or issue date | The date shown on the assessment or reassessment order as the date it was made or issued. | Copy it exactly from the order and confirm it through the Department’s authentication service when possible. |
| Service date | The date the order was served through the Department’s stated delivery method. | Keep the delivery record, portal notice, email header or other service evidence with the order. |
| Receipt or access date | The date you actually received the communication or first accessed it. | Record the date shown by your email, account activity or physical-delivery record. Do not substitute it for the order date. |
The Department’s notified Income-tax Rules, 2026 use separate fields for the “Date of the assessment/reassessment order” and the “Date of service.” You can review the notification and form in the Income-tax Rules, 2026 PDF (notified 20 March 2026).
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When making a chronology, label each entry with both the date and its source. For example, an order PDF may establish the issue date, while a portal inbox entry or email may establish service. If a courier record shows delivery on a later day, keep that as a separate receipt or delivery entry rather than overwriting either earlier date.
How to authenticate the order on the e-Filing portal
The official service is available before login, so you do not need an e-Filing account merely to authenticate a notice or order. Use the Department’s own domain and open Authenticate the Notice/order issued by ITD – User Manual for the current screen labels.
- Open the pre-login service. On the Income Tax Department e-Filing portal, choose Authenticate Notice / Order issued by ITD. The Department says both registered and unregistered users can use it.
- Choose an authentication route. Select either the PAN/document-details option or the DIN option. Use the route for which you have complete, accurate information.
- Enter the requested details. The PAN route requires your PAN, the document type, the relevant year, the date of issue and a mobile number. The DIN route requires the DIN and a mobile number. Enter the date of issue as printed on the order; do not enter the date you downloaded or opened it unless the document itself uses that date as its issue date.
- Complete mobile verification. Follow the on-screen mobile-number verification instructions. Use a number you can access while performing the search so you can complete the service’s verification step.
- Review the returned record. Compare the authenticated result with the paper or electronic order in your possession: taxpayer identity, document type, relevant year, DIN (if shown), issue date and the substantive order document.
- Save the evidence. Retain the order file, a PDF or printout of the authenticated result where available, and the date and time you performed the check. Keep the original email, portal message or delivery record separately.
- Build a three-date chronology. Enter the issue/order date, service date and actual receipt or access date in separate columns. This prevents an authentication search from silently changing a legally significant date.
Using the PAN and document-details route
This route is useful when the DIN is unavailable but the order contains the taxpayer’s PAN, document category, year and issue date. Transcribe the fields exactly as they appear. A year mismatch can produce a failed search even when the document is genuine, so check whether the portal asks for a tax year or assessment year and use the year printed or referenced in the order.
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Before submitting, compare every character of the PAN and the issue date with the order. Confirm that you selected the order category rather than a related notice or communication. If more than one year appears in the document, use the year requested by the service and retain a note explaining which year you selected.
Using the DIN route
A DIN-based search is the alternative when the order carries a DIN. Enter the DIN without altering its characters, together with the mobile number requested by the service. Compare the result with the entire document, not just the DIN. A matching DIN does not remove the need to check that the taxpayer, year, order type and issue date are the same.
Preserve the DIN exactly as displayed, including any letters, numerals or separators. Do not rely on a cropped screenshot that omits the heading or date. Save the complete order and the authentication output so another person can reproduce the comparison later.
How to compare the authenticated record with your document
Authentication should be a document-to-record comparison, not a date-only check. Use a worksheet like this before relying on the order in a filing, response or limitation analysis.
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| Item to compare | Where to find it | What a mismatch means |
|---|---|---|
| PAN or taxpayer identity | Order heading and authenticated result | Stop and check whether the wrong document or taxpayer record was supplied. |
| Document type | Portal selection and order heading | A notice, assessment order and reassessment order may be different records; do not treat them as interchangeable. |
| Tax year or assessment year | Order heading, computation and portal result | Check that you selected the same year. The year also determines which reassessment law may apply. |
| DIN | Order header or footer, where issued | A missing or different DIN warrants preservation of the document and case-specific clarification. |
| Date of issue/order | Order itself and authentication search | Record it separately from service and receipt dates. |
| Service evidence | Portal communication, email, courier or other delivery record | Authentication alone does not establish every question about legally effective service. |
Do not edit the original file when making notes. Save a read-only copy and put your working chronology in a separate document. If you print the order, keep the electronic original as well, including its metadata and any accompanying message.
What a successful authentication does—and does not—show
A successful result is useful evidence that the Department’s record corresponds to the identifying information submitted. It can help you confirm that the order date printed on your copy is the date associated with that record. It does not automatically prove that the document was served on a particular day, that the statutory period was calculated correctly, or that the reassessment is legally valid.
Keep authenticity and legal analysis as two separate tasks. First establish what document exists and what date it carries. Then analyze service, jurisdiction, limitation, response periods and the merits under the Act that governs the tax year. This separation avoids treating a portal confirmation as a decision on a disputed legal issue.
Which law applies to the reassessment?
The relevant tax year determines the transition framework. The Department’s Reassessment Proceedings FAQs state that the Income Tax Act, 2025 reassessment provisions in sections 279–286 apply to tax years 2026–27 and later—that is, tax years beginning on or after 1 April 2026.
- Tax years beginning before 1 April 2026: reassessment continues under the Income-tax Act, 1961, subject to the transition provisions.
- Tax years beginning on or after 1 April 2026: the 2025 Act reassessment provisions apply.
- Proceedings pending on 1 April 2026: the Department’s FAQ says they continue under the 1961 Act.
Do not infer the governing law from the date printed on the order alone. First identify the tax year involved, then check whether the proceeding was already pending on 1 April 2026. If an order concerns an earlier tax year but was issued after that date, the transition rule may still leave the proceeding under the 1961 Act.
Write the tax year and the applicable Act at the top of your chronology. If the document uses both “tax year” and “assessment year,” preserve both labels and note how they correspond. This prevents a year-selection error during authentication and gives an adviser the context needed to apply the transition rules.
How the order date relates to a limitation calculation
For the new Act, the Department’s FAQ describes section 286(1), table serial number 4, as generally requiring an order under section 279 within one year from the end of the financial year in which the section 280 notice was served. The same FAQ notes that specified extensions and exclusions can affect the period.
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That description is a framework, not a deadline for every case. A reliable calculation requires at least:
- the tax year and the Act that governs the proceeding;
- the date the relevant section 280 notice was served;
- the financial year in which that service occurred;
- any statutory extension or excluded period that applies; and
- the exact order date and service date shown by the records.
Use the authenticated issue date as one data point, but do not use it to replace the notice-service date that starts the period described in section 286(1). Nor should you treat portal authentication as a ruling that the order was timely. The Department’s service confirms document authenticity; it does not determine limitation, jurisdiction, natural justice or the merits of the reassessment.
When calculating, show the intermediate steps: identify the financial year of section 280 notice service, locate the relevant one-year endpoint, and list every extension or exclusion relied upon. Keep copies of the statutory notices and proof of service supporting each entry. If the order date appears close to an endpoint, obtain case-specific advice rather than assuming that the date on the PDF settles the issue.
Common mistakes to avoid
- Using the download date as the issue date. A file downloaded on a later day does not change the date printed on the order.
- Searching with the wrong year. Tax year and assessment year labels can differ; read the order and the portal prompt carefully.
- Checking only the DIN. A matching identifier must still be compared with the taxpayer, document type, year and date.
- Assuming authentication proves service. Keep independent portal, email, courier or other delivery evidence.
- Applying the 2025 Act automatically. Determine whether the tax year begins before or from 1 April 2026 and whether a proceeding was pending on that date.
- Discarding an unmatched document. Preserve the original and the failed or conflicting authentication result until the issue is resolved.
What to do when authentication fails or the dates do not match
No result from the PAN search
- Recheck the PAN, document type, year and date of issue character by character.
- Confirm whether the portal is asking for a tax year or assessment year and use the value associated with the order.
- Try the DIN route if a DIN appears on the document.
- Keep a screenshot or contemporaneous note of the failed search and preserve the document and delivery evidence.
The DIN result does not match the order
Do not assume that a partially matching result proves the order is valid. Compare the taxpayer identity, document type, year and issue date. Preserve both the document and the authentication output, then seek clarification from the Department or a qualified Indian tax adviser.
The order has no DIN or expected identifying details
Retain the file exactly as received, including its covering email or portal message. The absence of a detail may have legal significance, but the authentication page alone cannot decide that significance. Obtain case-specific advice before ignoring the order or allowing a response period to expire.
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That difference is not automatically an error. An order can be issued on one date and served or accessed later. Enter each date in its own field, attach the evidence for each, and avoid changing the order date to the receipt date.
The portal is unavailable or the mobile verification cannot be completed
Record the attempted date and time, retain the original document and delivery records, and retry through the official service when available. Do not upload the order to an unofficial “verification” website. If a statutory response or appeal period is running, obtain professional guidance promptly rather than waiting for the portal issue to resolve.
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Recordkeeping checklist
Create one folder for the reassessment and keep these items together:
- the complete order in its original electronic format and a readable backup;
- the authenticated result or a dated record of the authentication attempt;
- the DIN, if present;
- the notice that initiated the relevant proceeding and evidence of its service;
- portal inbox entries, emails, courier records or other delivery evidence;
- a chronology with separate columns for order date, service date and receipt/access date;
- the tax year, assessment year (if used in the document) and the Act you believe governs; and
- notes of any communication with the Department or an adviser.
Use consistent date formatting, such as 18 October 2026, and label the source of every entry. A chronology that says only “date received” is not enough when the order itself carries a different issue date.
Use a filename that preserves the original, such as the taxpayer identifier, tax year and document type, but do not rename the original in a way that obscures its metadata. Keep a separate working copy for highlighting or annotations. If several communications concern the same proceeding, retain them in chronological order so the initiating notice, service evidence and final order can be traced together.
When to obtain case-specific tax advice
Consult an Indian chartered accountant or tax lawyer when the authenticated record does not match the document, the order lacks expected identifiers, service is disputed, a limitation date is close, or the transition between the 1961 and 2025 Acts is unclear. Provide the adviser with the order, authentication output, initiating notice, service proof and your three-date chronology.
Ask the adviser to analyze the legal issue separately from the authenticity check. The Department’s authentication workflow can help establish that a record exists and corresponds to the document details entered; it cannot substitute for an opinion on limitation, valid service, jurisdiction or the substantive grounds of reassessment.
A concise verification workflow
- Open the official pre-login Authenticate Notice / Order issued by ITD service.
- Search by PAN and document details or by DIN and mobile number.
- Match the returned record to the complete order.
- Write down the order date exactly as shown.
- Record service and actual receipt/access dates separately, with evidence.
- Identify the tax year and apply the correct transition framework.
- Analyze any limitation period using the legally relevant notice-service date, statutory extensions and exclusions—not authentication alone.
- Escalate mismatches or legal uncertainties with the full record set.
Frequently Asked Questions
How do I verify the date of an income-tax reassessment order?
Use the Income Tax Department’s pre-login “Authenticate Notice / Order issued by ITD” service. Search through the PAN/document-details route or the DIN route, compare the returned record with the complete order, and record the printed issue date separately from service and receipt/access dates.
How can I authenticate an income-tax notice or order without logging in?
The Department says the authentication service is available to registered and unregistered users. Open it on the official e-Filing portal, select the PAN/details or DIN option, provide the requested mobile number and complete the on-screen verification.
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How can I verify an income-tax order by DIN?
Select the DIN route and enter the DIN and mobile number requested by the service. A matching DIN is only one part of the check; also compare the taxpayer identity, document type, tax year and issue date with your copy.
Is the order date the same as the date I received it?
Not necessarily. The order or issue date, the service date and the date you actually received or accessed the document are distinct. The notified Income-tax Rules, 2026 use separate fields for the order date and date of service.
Does portal authentication prove that a reassessment order is within limitation?
No. Authentication helps confirm that the Department’s record corresponds to the document details submitted. Limitation requires the governing Act, the section 280 notice-service date, the relevant financial year and any applicable extensions or exclusions.
Which Act governs a reassessment for an earlier tax year issued after 1 April 2026?
The Department’s FAQ says reassessment for tax years beginning before 1 April 2026 remains under the Income-tax Act, 1961, subject to transition provisions. Proceedings pending on 1 April 2026 also continue under that Act. The 2025 Act provisions apply to tax years beginning on or after 1 April 2026.
What should I do if the portal cannot find my order?
Recheck the PAN, document type, year and issue date; confirm whether the portal requests a tax year or assessment year; and try the DIN route if available. Preserve the original document, delivery evidence and a dated record of the failed search, then seek clarification if a deadline is running.
Should I ignore an order that has no DIN or has conflicting dates?
Do not ignore it solely for that reason. Preserve the file, covering message and delivery records, save the authentication output, and obtain case-specific clarification from the Department or a qualified Indian tax adviser before allowing any response or appeal period to expire.
The Bottom Line
Authenticate the document through the official pre-login service, compare every identifying field, and maintain separate entries for issue/order, service and receipt/access dates. Apply the reassessment rules according to the tax year and governing Act; authentication alone does not decide service, limitation or validity.
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