# US 12,182,287 B2 · System and method for multi-party electronic signing of electronic documents > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,182,287 B2 - Document ID: US12182287B2 - Status: Granted - Kind: B2 - Application number: 18/517,569 - Filed: 2023-11-22 - Published: 2024-03-14 - Granted: 2024-12-31 - Earliest claimed: 2018-07-16 - Assignees: The Toronto-Dominion Bank - Applicants: The Toronto-Dominion Bank - Inventors: Avinash Malliah; Gregory Boddison; Angelique Louise Carle - Web page: https://patentgrep.com/patent/US12182287B2 ## CPC - G06F 21/6209: {to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself} - G06F 16/176: Support for shared access to files; File sharing support - G06F 21/64: Protecting data integrity, e.g. using checksums, certificates or signatures - H04L 9/0891: {Revocation or update of secret information, e.g. encryption key update or rekeying} - H04L 9/3247: {involving digital signatures} - H04L 9/3255: {using group based signatures, e.g. ring or threshold signatures} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A computer-implemented method is disclosed. The method includes: sending, to a plurality of computing devices, an invitation containing a link to access a first electronic document in a first state; detecting a change in state of the first electronic document from the first state to a second state; identifying a first subset of the computing devices including devices that did not provide any indication of approval for the first electronic document and devices that have already received requests for updated approvals for the first electronic document; sending, to a second subset of the computing devices that are not included in the first subset, requests to provide indications of approval for the first electronic document in the second state; and responsive to receiving indications of approval for the first electronic document from computing devices of the second subset, generating a locked form of the first electronic document in the second state. ## Claims ### Claim 1 A computing system, comprising: a processor; and a memory coupled to the processor, the memory storing computer-executable instructions that, when executed by the processor, configure the processor to: send, to a plurality of computing devices, an invitation containing a link to access a first electronic document in a first state; receive, from at least one of the computing devices, a first indication of approval for the first electronic document in the first state; detect a change in state of the first electronic document from the first state to a second state; identify a first subset of the computing devices including devices that did not provide any indication of approval for the first electronic document and devices that have already received requests for updated approvals for the first electronic document; send, to a second subset of the computing devices that are not included in the first subset, requests to provide indications of approval for the first electronic document in the second state; receive, from computing devices of the second subset, second indications of approval for the first electronic document in the second state; and responsive to receiving the second indications of approval, generate a locked form of the first electronic document in the second state for submitting to a virtual document signing ceremony. ### Claim 2 (depends on 1) The computing system of claim 1, wherein the instructions, when executed, further configure the processor to receive, from a first computing device: the first electronic document in the first state; and a selection of one or more second computing devices, wherein the invitation is sent to each of the second computing devices. ### Claim 3 (depends on 1) The computing system of claim 1, wherein the instructions, when executed, further configure the processor to validate each of the second indications of approval, wherein the locked form of the first electronic document in the second state is generated only if all of the second indications of approval are validated. ### Claim 4 (depends on 1) The computing system of claim 1, wherein the instructions, when executed, further configure the processor to send, to each computing device of the second subset, a message evidencing receipt of a respective second indication of approval. ### Claim 5 (depends on 1) The computing system of claim 1, wherein the instructions, when executed, further configure the processor to provide, to at least one of the computing devices, details of changes to document data of the first electronic document that were made since a most recent indication of approval transmitted from the at least computing device. ### Claim 6 (depends on 1) The computing system of claim 1, wherein the instructions, when executed, further configure the processor to limit a number of computing devices that can concurrently make changes to document data of the first electronic document. ### Claim 7 (depends on 1) The computing system of claim 1, wherein sending the invitation comprises registering a unique one-time password for each of the computing devices for accessing the first electronic document. ### Claim 8 (depends on 2) The computing system of claim 2, wherein detecting the change in state of the first electronic document comprises detecting changes to document data of the first electronic document made via at least one of the second computing devices. ### Claim 9 (depends on 2) The computing system of claim 2, wherein the locked form of the first electronic document in the first state is generated only upon receiving the second indications of approval from all of the second computing devices. ### Claim 10 (depends on 3) The computing system of claim 3, wherein validating the second indications of approval comprises authenticating users associated with the second indications of approval. ### Claim 11 A computer-implemented method, comprising: sending, to a plurality of computing devices, an invitation containing a link to access a first electronic document in a first state; receiving, from at least one of the computing devices, a first indication of approval for the first electronic document in the first state; detecting a change in state of the first electronic document from the first state to a second state; identifying a first subset of the computing devices including devices that did not provide any indication of approval for the first electronic document and devices that have already received requests for updated approvals for the first electronic document; sending, to a second subset of the computing devices that are not included in the first subset, requests to provide indications of approval for the first electronic document in the second state; receiving, from computing devices of the second subset, second indications of approval for the first electronic document in the second state; and responsive to receiving the second indications of approval, generating a locked form of the first electronic document in the second state for submitting to a virtual document signing ceremony. ### Claim 12 (depends on 11) The method of claim 11, further comprising receiving, from a first computing device: the first electronic document in the first state; and a selection of one or more second computing devices, wherein the invitation is sent to each of the second computing devices. ### Claim 13 (depends on 11) The method of claim 11, further comprising validating each of the second indications of approval, wherein the locked form of the first electronic document in the second state is generated only if all of the second indications of approval are validated. ### Claim 14 (depends on 11) The method of claim 11, further comprising sending, to each computing device of the second subset, a message evidencing receipt of a respective second indication of approval. ### Claim 15 (depends on 11) The method of claim 11, further comprising providing, to at least one of the computing devices, details of changes to document data of the first electronic document that were made since a most recent indication of approval transmitted from the at least computing device. ### Claim 16 (depends on 11) The method of claim 11, further comprising limiting a number of computing devices that can concurrently make changes to document data of the first electronic document. ### Claim 17 (depends on 11) The method of claim 11, wherein sending the invitation comprises registering a unique one-time password for each of the computing devices for accessing the first electronic document. ### Claim 18 (depends on 12) The method of claim 12, wherein detecting the change in state of the first electronic document comprises detecting changes to document data of the first electronic document made via at least one of the second computing devices. ### Claim 19 (depends on 12) The method of claim 12, wherein the locked form of the first electronic document in the first state is generated only upon receiving the second indications of approval from all of the second computing devices. ### Claim 20 (depends on 13) The method of claim 13, wherein validating the second indications of approval comprises authenticating users associated with the second indications of approval.