https://gitlab.wikimedia.org/repos/phabricator/extensions/-/blob/wmf/stable/src/customfields/MediaWikiUserpageCustomField.php would have been the place;
T344303 for the Conduit API got implemented a while ago; related code like phabricator/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php which may need adjustments may change due to T364088.
However due to T363009 I am going to decline this.

Big thanks to Daniel and Katie for clarifying this process! <3

@Dzahn Yes, thank you, I meant L2! I appreciate your edits to the page and your work on this as well!

I made the following edits to the "Volunteer NDA" docs to reflect this change:

@KFrancis Thank you very much and apologies as well for the delay on my side.

Hello @Dzahn, my sincere apologies for the length of time it has taken to resolve this open issue! After consulting with legal counsel, and careful consideration, in order to keep with consistent legal practices, we've determined https://phabricator.wikimedia.org/L3 should be retired and all NDA requests should go directly through legal. Do you need additional information or written confirmation from legal counsel to close this form? If so please let me know as soon as possible! Thank you again for your patience while we sorted this out.

This would also help to solve T358578

@KFrancis A reference to L2 is here: https://wikitech.wikimedia.org/wiki/Volunteer_NDA#Welcome_to_the_NDA_club!

Question... Historically, do you have a policy or guideline on your end for using https://phabricator.wikimedia.org/legalpad/signatures/2/ rather than getting an NDA done through me?

moving it elsewhere would allow us to decommission Legalpad

I wonder if https://phabricator.wikimedia.org/L3 would also be in scope for this question, as moving it elsewhere would allow us to decommission Legalpad?

Hi @KFrancis I don't have the permissions to add people to the WMF-Legal group but as Aklapper said above for example Stephen LaPorte, Jacob Rogers, Aeryn Palmer or Chuck Roslof should be able to add you.

@KFrancis: Could you please ask any of the five folks listed as "Members" on https://phabricator.wikimedia.org/project/members/28/ to also add your account as a member? In my understanding of the setup, this should give you access. Thanks!

Hi @Dzahn, would it be possible for me to get access to https://phabricator.wikimedia.org/legalpad/signatures/2/?

@KFrancis see above. L2 is part of "Legalpad" (https://phabricator.wikimedia.org/legalpad/) a Phabricator extension created for Legal back then.

In T349595#9305974, @KFrancis wrote:

Hi all, a couple questions... Do you have information in whomever created the https://phabricator.wikimedia.org/L2 form and do you know where the e-signed completed forms go?

Hi all, a couple questions... Do you have information in whomever created the https://phabricator.wikimedia.org/L2 form and do you know where the e-signed completed forms go?

In T349595#9298822, @KFrancis wrote:

If you need me to process the usual NDA on my end, I can take are of that. Please let me know!

In T349595#9298822, @KFrancis wrote:

Hi @Aklapper I have this inquiry in with legal counsel and should have an answer for you by the end of the week. I received an inquiry about an NDA for user https://phabricator.wikimedia.org/p/Xqt/. It looks like they signed the online NDA doc that we are working on the answer for you. I do not receive copies of the online NDA, so that is why they are not on the tracking sheet. If you need me to process the usual NDA on my end, I can take are of that. Please let me know!

Hi @Aklapper I have this inquiry in with legal counsel and should have an answer for you by the end of the week. I received an inquiry about an NDA for user https://phabricator.wikimedia.org/p/Xqt/. It looks like they signed the online NDA doc that we are working on the answer for you. I do not receive copies of the online NDA, so that is why they are not on the tracking sheet. If you need me to process the usual NDA on my end, I can take are of that. Please let me know!

Thank you so much! I'll have Jim review that page and I'll get back to you soon!

Sure! Also added @JbuattiWMF.

Thanks so much! Would you please add access for James Buatti jbuatti@wikimedia.org as well?

@KFrancis: No problem! :) I think you should be able to access L2 now.

Hi all, my apologies or the delay on this. Would it be possible to either get access to https://phabricator.wikimedia.org/L2 OR could you copy and past the content from this link? I don't have access and neither does the relevant legal counsel member who may be able to provide an answer for you.

As the WMF-Legal project tag was added to this task, some general information to avoid wrong expectations:
Please note that public tasks in Wikimedia Phabricator are in general not a place where to expect feedback from the Legal Team of the Wikimedia Foundation due to the scope of the team and/or nature of legal topics. See the project tag description.
Please see https://meta.wikimedia.org/wiki/Legal for when and how to contact the Legal Team. Thanks!

I updated L3 to reflect the suggestion.

Looks like acl*sre-team members can edit this form (I cannot)