Principal-agent representation determines deemed supply under GST when agent issues invoice in own name, triggering registration where supplies are taxable The circular clarifies that a transfer between a principal and an intermediary is deemed to be a supply under Schedule I only when the intermediary acts in a representative capacity to supply or receive goods on behalf of the principal, with the operative indicator being whether the intermediary issues the invoice and transfers title in his own name. Pure facilitation or procurement where the principal's name appears on invoice does not attract the deemed-supply rule; services remain subject to consideration. Compulsory registration arises when taxable supplies are made on behalf of taxable principals, while agricultural commission agents may be exempt where principals are non-taxable or supplies are exempt.