If a user already has their own Vendor Organization, either due to duplicate accounts existing before this change or otherwise, and another Vendor invites them to be a user on their Vendor Organization, this will initiate a merge of the two accounts.
The actual process for this is quite straightforward for the two users. It would be the exact same as normally inviting a user, only now the user being added is also coming with additional information and connections. Please see our guide Inviting a new user to a Vendor Organization for more information.
The invited user will receive an email notification, telling who invited them (vendor organization name, email) and will also contain a link to documentation explaining the merging process. Once the invited vendor accepts the invitation, the inviting vendor will receive a notification to confirm and accept the merging process on their end. Once accepted, the merge will happen in the background.
The merge works by looking at the inviting vendor first, and taking the data in their vendor organization record as priority. It will add any net new fields from the invited vendor if these fields don't exist in the inviting vendor.
Here's a flow chart to help break it down
Its important to keep in mind in this example Vendor B's original account would cease to exist after accepting this user invite/merge. They will receive an excel spreadsheet as a form of a receipt for all the activity they did on the original account. If Vendor B happened to leave Vendor A at any point, it is impossible to reactivate their original account, they would have to sign up for a new one. Please see our guide to Vendor Registration for more information on creating a new account.