Where do I find my India Post consignment number?
An India Post consignment number is printed on the booking receipt handed over at the post office counter, repeated in human-readable form under the barcode on the article label, and sent in the booking SMS to the mobile number recorded at acceptance. It is the 13-character code that India Post's own search form labels Consignment Number, Consignment ID or Article Number (India Post, 2026). For an online purchase the number arrives in the seller's dispatch message instead, and for anyone with a Department of Posts login it sits in the booking record inside the Customer Self Service Portal.
Indian usage says consignment number where most operators say tracking number. The two name the same identifier, and both go into the same field.
Which India Post products issue a number at all
A consignment number exists only where the article was booked at a counter and barcoded at acceptance, so the search begins with the service used rather than with the paperwork. India Post lists nine domestic mail products on its mail products page: Letter, Letter Card, Post Card, Book Post, Literature for Blind, Periodical Post, Registered Newspaper, India Post Parcel (Retail) and Gyan Post. The ordinary letter classes in that list travel as stamped mail, and none of them carries the 13-character identifier that a booked article receives.
Booked services work the other way round. Speed Post, Registered Post, retail parcels and outbound international EMS are accepted against a receipt, and acceptance is the moment the identifier is generated, printed and bound to the article. An item dropped into a letter box with stamps on it produces no counter transaction, no receipt and no barcode, which means no number was ever issued and none can be recovered afterwards.
This gate decides whether the rest of the search is worth running. A reader looking for a number on an ordinary letter is looking for something that never existed, while a reader holding a Speed Post or Registered Post receipt has at least four independent places to check. The service split also decides what the number buys: the difference between Speed Post and Registered Post is speed versus proof of delivery, but both are booked, barcoded and traceable.
What the number looks like, so it can be picked out of a receipt
The identifier is 13 characters long and follows Universal Postal Union standard S10, the numbering scheme postal operators use for tracked, registered and express items worldwide. The Universal Postal Union publishes a validation tool for it:
"S10 Check Digit Validation Tool ... checking the validity of an S10, 13-character identifier by calculating the check digit in character position 11." (Universal Postal Union, UPU Standards, accessed July 2026.)
Because the check digit sits at position 11 of 13, the final two characters are the country code, and every India Post consignment number therefore ends in IN. The first two characters are a service indicator, but the letters shift between products and product generations, so the prefix is a weak signal of which service was used and should not be read as a product label. The code contains no spaces, even where a receipt prints it in groups for legibility.
Recognising the shape is half the search. On a cluttered receipt, or on a label crowded with routing marks, the 13-character block ending in IN is the only element that queries the India Post network, and everything else printed alongside it is a booking, office or postage reference. The same recognition test applies to tracking numbers issued by other operators, which is why an S10 code is legible to customs systems and destination post offices without translation.
The counter receipt and the e-receipt that replaces it
The counter receipt issued at the moment of booking is the primary record of the consignment number, and it is the only source that exists before the article has moved anywhere. It is printed and handed over in the same transaction that generates the barcode, which is why an article booked but not yet scanned into transit already has a findable number.
A lost paper receipt is not always final. India Post's home page carries four direct actions next to its search box: Track 'N' Trace View, Locate Post Office, Download e-Receipt and Calculate Postage of Articles (India Post, 2026). The e-receipt route reproduces the booking document rather than the article itself, so it answers the question a torn or faded counter slip cannot.
Where the booking was made through a franchise outlet or a business counter rather than a departmental post office, the receipt still carries the same 13-character code, because the identifier is allocated by the booking system and not by the outlet. The office name and date printed beside it matter later: they are the details a post office asks for when a booking has to be traced back from a complaint.
The label on the article, and what a recipient can read
The same 13-character code is printed in human-readable digits directly beneath the barcode on the label affixed to the article, which makes the label the only source a recipient controls. A recipient never sees the sender's receipt, never receives the sender's booking SMS and has no access to the sender's portal account, so for anyone on the receiving end the label is the search.
The label survives the whole journey, which is what distinguishes it from every other source. It is scanned at each handling point, so the number on the article and the number in the tracking system are the same string by construction, with no transcription step in between where a digit can be dropped.
On an item posted from India to another country, the S10 code stays on the article after handover to the destination operator, and any additional label applied abroad sits alongside it rather than replacing it. Merchandise items also carry a customs declaration attached to the outer packaging, and the consignment number is repeated there so that the declaration and the article stay matched during clearance.
The booking SMS and email confirmation
India Post sends an SMS at booking to the mobile number recorded in the transaction, and that message contains the consignment number. Its own service documentation states the alerting explicitly:
"Real-time end-to-end tracking available online with SMS alerts for key events like booking, out-for-delivery, and status updates." (India Post, 24/48 Speed Post FAQs, accessed July 2026.)
The booking SMS reaches whoever's mobile was given at the counter, which is normally the sender. Where a sender books on someone else's behalf and supplies their own mobile, the recipient gets nothing and the sender has to forward it. That single detail explains most cases where a number is described as missing when it was in fact delivered to a different handset.
Premium tiers attach more messages to the same number. India Post's 24 Speed Post product runs in all pin codes of six metro cities, carries OTP verification on handover, caps a parcel at 5 kg and allows a postage refund claim online within 7 days if next-day delivery is missed (India Post, 24/48 Speed Post FAQs). Each of those events is keyed to the consignment number, so the SMS thread itself becomes a partial history of the article.
Bookings made online and the record in a registered account
Online bookings write the consignment number into an account record that survives independently of any receipt or message. Access to that record is conditional:
"This service is available for Registered Users only. Please Register/Login your self with Department of Post." (India Post, Customer Self Service Portal, accessed July 2026.)
Registration is not a single flow. India Post's portal help documentation describes four sign-in categories, Retail, Corporate, CSF/Franchise and KCPF, and states that a retail account is activated through an emailed link within 48 hours of registration (India Post, Help and FAQs). A booking made before an account existed does not appear retroactively inside one.
For frequent senders this is the most durable of the six sources, because it holds a list rather than a single item. The portal is also the route to a reproduced e-receipt, so an account holder searching for one old consignment number is usually one login away from every number booked under that account (India Post, Customer Self Service Portal).
Who can see the number, and how long each source lasts
Six routes carry the consignment number, and only one of them, the label on the article, is visible to someone who did not book the item. The table sets out what each source is called, who can reach it, and whether it can be reproduced after the original is lost.
| Source | Label used there | Available to | Reproducible if lost |
|---|---|---|---|
| Counter booking receipt | Article number or consignment number | Sender only | No, unless the booking is tied to a registered account |
| e-Receipt on the India Post portal | Consignment number | Registered account holder | Yes, downloadable from the portal |
| Barcode label on the article | 13 characters printed under the barcode | Sender and recipient | Only while the article and its packaging exist |
| Booking SMS | Consignment number | Holder of the mobile number given at booking | No, unless the message is still on the handset |
| Customer Self Service Portal booking history | Consignment number | Registered account holder | Yes, listed with the other bookings |
| Seller dispatch email or order page | Tracking ID or shipment number | Buyer | Yes, from the order page |
Two patterns fall out of the table. Everything issued at the counter reaches one person and is not reissued, while everything tied to an account or an order page can be reproduced on demand, which is the practical argument for booking through a registered account when the number is likely to be needed months later.
Ecommerce orders: what the seller sends and what it is not
On a marketplace order the consignment number is generated when the seller books the shipment, not when the order is placed, so it appears only in the dispatch notification and on the order page afterwards. Before dispatch there is nothing to find, and an order confirmation that arrives within seconds of payment never contains a postal identifier.
Sellers rarely use India Post's own vocabulary. A dispatch email typically calls the value a tracking ID, a shipment number or an AWB number, and the courier field on the order page names India Post or Speed Post beside it. Only the 13-character code ending in IN queries the India Post network; the order ID identifies the transaction with the seller and returns nothing on a postal tracking form.
Bulk shippers add one more layer. India Post's business services include a Book Now Pay Later credit facility, and the department sets the condition plainly: "Bulk customer is eligible for credit facility provided he enters in to an agreement with the Department." Consignments booked under such an agreement are manifested in batches, which is why a marketplace can display a number some hours before the article is physically handed over and scanned.
Receiving an item posted from India
The same 13-character number follows the article onto the destination country's postal operator, because an S10 identifier is designed to be readable across the Universal Postal Union network rather than inside one operator (UPU Standards). A recipient abroad who has the number from the sender can query it both on India Post and on the operator handling the final leg.
Where the sender has gone quiet, the label is the fallback, but it only becomes readable once the item is in hand, which is too late to be useful for tracking. The practical route is to ask the sender for the counter receipt, since the receipt exists from the moment of booking while the label does not become visible to the recipient until delivery.
Inbound items arriving in India work the same way in reverse: the foreign operator's own S10 code, ending in that country's two-letter code rather than IN, is what India Post accepts once the article has been handed over at a foreign post office. The domestic legs and their scan wording are set out on the India Post tracking page.
When the receipt is gone and the number cannot be found
India Post issues the consignment number to the booking party, which means a lost number is recovered from the sender or the booking office and never from the delivery address. No lookup turns a name, an address or a pin code into a consignment number, because the identifier is bound to the booking transaction rather than to the destination.
The booking office is the last resort where the sender booked at a counter without an account. The office holds the record of the transaction and can trace it from the date, the destination and the postage paid, so the details printed beside the number on the original receipt are worth reconstructing before making the visit.
India Post publishes a national helpline on 18002666868, staffed from 8:00 AM to 8:00 PM, with an IVRS facility available 24 hours a day, 365 days a year (India Post, 2026). Complaints are filed through the Department of Posts grievance portal, and the form asks for the consignment number, which is why the number has to be found before a case can be opened rather than after. A general method for tracing a missing identifier across carriers is set out in how to find a tracking number.
What the consignment number is confused with
India Post's home page tracking widget offers six separate reference fields, and three of them are alternative names for the same booked-article identifier. Entering the wrong reference type returns no result even when the value itself is correct, which reads on screen exactly like a lost article.
| Reference | What it identifies | Where it comes from |
|---|---|---|
| Consignment Number | A booked article | Booking receipt, article label, booking SMS |
| Consignment ID | The same booked article, alternative field name | India Post tracking form |
| Article Number | The same booked article, the wording used on receipts | Counter receipt |
| Money Order | An electronic money order, a remittance rather than an article | Money order booking receipt |
| Complaint ID | A grievance case already registered | Acknowledgement issued after filing a complaint |
| Reference Number | A portal transaction such as an online booking or a payment | Portal confirmation screen |
| Order ID (seller, not India Post) | The purchase agreement with a retailer | Order confirmation email or account page |
The nearest neighbour is the money order reference, because electronic money orders move through the same offices and generate their own receipt, yet no article exists behind one. The other frequent mismatch is the seller order ID, which is issued by the marketplace and carries no meaning inside the postal network at all.
Once the correct 13-character code is in hand, the fastest confirmation is to run it and read the full scan history rather than the last line, because the booking scan at the origin office is what proves the number was issued against a real article.