Not the CA's work, but the institution acting on the file
Getting the stamping wrong rarely stops the CA's work. More often it stops the institution acting on the file, because the document looks complete and then fails at the moment it is needed.
Net Worth & Solvency Glossary · Documents
Stamp duty is a tax on documents (instruments), not on transactions. In India it is charged on instruments such as conveyances, mortgages, leases, gift deeds, powers of attorney, affidavits and indemnity bonds, under the Indian Stamp Act as applied by each state, or under a state's own stamp law.
Rates and the list of chargeable documents vary from state to state.
Meaning
The duty attaches to the document that records a transaction, not to the transaction itself. The same deal can attract duty, or not, depending on whether it was put in writing and in what form.
A sale, a loan, a promise to indemnify: on its own, the transaction is not what stamp law charges.
Once the deal is put in writing, the document that records it is the chargeable instrument, and its form decides the duty.
Because stamp law is largely a state subject, both the list of chargeable instruments and the rates differ by state. This entry does not give rates, because they are set by state law and change.
Where it bites. An under-stamped or unstamped document can run into trouble when it has to be relied on as evidence, so getting the duty right at execution matters.
In a certification file
In a certification file, the papers that need stamping are usually the supporting ones, not the CA's certificate itself.
Getting the stamping wrong rarely stops the CA's work. More often it stops the institution acting on the file, because the document looks complete and then fails at the moment it is needed.
Where a document is signed in one state and used in another, the stamp law of each may matter, so the state is checked before the paper is bought.
Paying it
Payment has largely moved to e-stamping.
Issued through Stock Holding Corporation of India Ltd (SHCIL) as the central record-keeping agency and its authorised collection centres.
For small amounts in some states.
An e-stamp certificate carries a unique number that can be checked online, which has made forged stamp paper much harder to pass.
Short-stamping is not a rounding error. Under-stamping can cost more than the duty that was short, so guessing the amount is risky.
The rate and the classification of an instrument remain state matters, so the same undertaking can be correctly stamped in one state and short in another.
Basis: the Indian Stamp Act as applied by each state, and the states' own stamp acts, as named in the definition. This entry describes Indian practice in general terms. The stamp law of the state concerned governs each document.