Sabek dag to hal dag — matching old and new plot numbers

What sabek and hal actually mean

Sabek means the former or old number. Hal means the current or present one. The words are used for both dag (plot) numbers and khatian numbers, and they are relative terms rather than fixed labels — what is "hal" today was "sabek" the moment a newer survey superseded it.

So a plot may be described as sabek dag 412, hal dag 1087. That is one piece of land with two identifiers, belonging to two different generations of record.

Nobody renumbered the land to be difficult. Each survey was an independent field exercise that assigned numbers in its own sequence, so the new numbering has no obligation to resemble the old.

Why the numbers changed at all

West Bengal's records were built up through successive surveys — Cadastral Survey (CS), then Revisional Survey (RS), then Land Reforms (LR). Each one produced a fresh set of maps and a fresh set of plot numbers for the area it covered.

Between surveys, the ground itself also changed. That is why the mapping between old and new is not always a tidy one-to-one:

• A plot was subdivided. One sabek dag can become several hal dags after partition, sale of a portion, or inheritance among heirs.
• Plots were merged. Several sabek dags held together can appear as a single hal dag.
• Boundaries shifted. Roads, canals, embankments and acquisitions redrew parcels between surveys.
• The area figure moved. Different survey methods yield different measurements for the same ground, so the recorded area against a hal dag may not exactly equal the sabek figure.

Why a mismatch is the top cause of a failed search

Think about where people get their numbers. They come from a deed, an old porcha, a mutation paper, a family partition document — and those papers are as old as the transaction that produced them. A deed from decades ago carries the numbering that was current when it was written.

Meanwhile the portal search you are running is against the record generation you selected. Type a sabek number into a search scoped to the current record and there is often simply nothing there to find. The portal returns an empty result, which reads like a failure but is actually a correct answer to the wrong question.

Two other things frequently compound it, and both are worth ruling out before you conclude the number is stale:

• The Mouza is wrong. Dag numbers are only unique within a Mouza. The right number in the wrong Mouza returns nothing — or, worse, returns someone else's plot.
• The record generation is wrong. Searching RS with an LR number, or the reverse, fails the same way. Check which generation your number came from before deciding it doesn't exist.

How people actually match sabek to hal

There is no single button that converts one number to the other for every plot in the state. The portal's RS-LR lookup is best treated as a finding aid rather than a conclusive correlation — it often returns nothing for a given plot, and no official source presents it as determinative. In practice people use a combination of the following, and cross-check rather than trusting one alone.

• Work from the khatian, not the dag. If you know the landholder's khatian in the current record, open it — a khatian lists the dags held under it, which often surfaces the current number without needing the conversion at all.
• Try the recorded owner name, if the search offers it. Where the recorded name is still the same family this can occasionally locate the plot — but it is the least reliable route, because digitised spellings vary and the record may still name an earlier holder.
• Compare the maps. A Mouza map for each generation, read side by side against known landmarks — a road, a pond, a neighbouring holding — is how the match is confirmed on the ground.
• Read the chain of documents. Later documents, particularly mutation and partition papers, frequently quote both the sabek and hal numbers together, because they were written during the transition.
• Ask a neighbour or the local office. Long-settled neighbours and the local land office often know the correspondence for a Mouza far better than any online source.

When you need the BL&LRO office

Online lookups are for finding and reading records. They cannot change a record, and they cannot adjudicate anything. Stop searching and go to the BL&LRO office for the Block your Mouza falls under when:

• You cannot establish the correspondence between your sabek and hal numbers from documents and maps.
• The hal record names an owner who is not the person your documents say should be there.
• The recorded area differs materially from what your deed states.
• Your sabek plot appears to have been merged into a holding you have no connection to.
• You need any correction made to the record — that is an administrative process, initiated at the office.

Where these lookups live on the portal

Know Your Property takes District, Block and Mouza, then a khatian or plot number. RS-LR Plot Information covers how a plot reads across record generations. Mouza Information is where to start if you are not certain which Mouza your land sits in. All three sit under Citizen Services, and all three expect you to be signed in before they return a record — you can open the form and step through the dropdowns while signed out, but the request for the record itself lands on the sign-in page. Register on banglarbhumi.gov.in before you begin; a sabek-to-hal trace involves several searches in a row and stopping to register mid-way is a nuisance.

Signed copies and map requests are a further step again — Mouza Map Request, Plot Map Request and ROR Request sit under Service Delivery and also require you to be signed in.