In the context of digital file sharing, "patched" can sometimes imply an altered file.

The 2001–02 Ready Reckoner is now more than 20 years old. Even an authentic copy should not be used to calculate current stamp duty – that requires the latest ASR. It may be useful for:

If you need it for a legal valuation (e.g., court case from 2002), obtain a certified copy from the Office of the Superintendent of Stamps, Mumbai (Old Customs House, Fort) rather than relying on any patched PDF.

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Several licensed real estate data firms (e.g., PropIndex, Square Yards Data, or local legal databases) have legally produced a "Ready Reckoner 2001-02 Mumbai PDF patched" for their subscribers. They pay for digitization services. Access is usually via a subscription or one-time document fee.