> For the complete documentation index, see [llms.txt](https://docs.cdpi.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cdpi.dev/technical-notes/digital-ids-and-electronic-registries/electronic-signature-pki-and-trust-infra/esign.md).

# eSign

eSignatures can be built as a capability on top of any identity system. They allow an individual to avoid a physical or wet signature, and instead sign a document remotely using a method of identity authentication. These documents could include loan agreements, property ownership agreements, or closure of business documents, for instance.

eSignature is a protocol that can allow an ecosystem of electronic signature providers to facilitate legally valid signatures as a service to various public and private institutions, typically building on an existing identity authentication and eKYC API.

An example eSign ecosystem could be architected as follows:

<figure><img src="https://lh7-us.googleusercontent.com/IC-44mcq600I2fY3nsNotcs747-NeXOERLkH_Jo0N1miAmrxtkZPG2ZpObR0I3CLJdd1vARqtW6KTQSgihWtQSileQT5nHPcRPf1GfZnpOfigEe8g_hJMLtJ-OQovaG3pbU8daVmJJXn82KNEwqsi6c" alt=""><figcaption></figcaption></figure>

Source: <https://cca.gov.in/sites/files/pdf/esign/eSign-APIv3.3.pdf>&#x20;

Further resources:&#x20;

<https://cca.gov.in/sites/files/pdf/ACT/eSign-APIv2.1.pdf>


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