Name for payment recipient identifiers.

Suggests calling Bitcoin addresses 'invoices' or 'invoice addresses', to stress that each should be used only once.

The word 'address' suggests something that rarely changes, like a postal or email address. Bitcoin addresses are meant for a single payment, with a fresh one for each. This BIP proposes 'Bitcoin Invoice Address', with 'Bitcoin' and 'Address' optional, so people treat them as one-time use.