Apply to be a registered supplier
Vaults can only pay addresses an admin registered. Applying is a public, signed request an admin reviews — it grants nothing by itself.
Apply to be a registered supplier
You sign this with the wallet you want to be paid at. The application is an attestation: public, dated and attributable to that address.
Connect the wallet you want vaults to pay.
Only its hash is published, so an admin can check it against the document you show them.
An admin still has to grant SUPPLIER_ROLE before an NGO can name you in a payment plan. Your application stays visible on the suppliers page until then.