How does “One owner of a company's identity” work on the Company Structure page?

Company Structure owns each company's legal identity. The company row that BillScan, letters, HMRC tracking, contracts and the audit file read is a mirror of it: when a linked company is saved, or a Companies House difference is accepted, its name, number, VAT number, UTR and registered address are written through. Only values that are filled in are mirrored, so a blank here never wipes a number the company row already carries; the entity kind, jurisdiction and currency of a company are decided on Settings → Organisation → Companies & entities, and a foreign company's registry details show on its workspace rather than Companies House fields. If something looks blank elsewhere in Saral, the fix is to fill it in here, once. Where: Company Structure (/accounts/company-structure).