Having wandered to the Registry list of publishers (https://www.iatiregistry.org/publisher) I noticed that the “Organisation Type” field contains values that do not seem to reflect the organisation’s status.
This is particularly the case for “International NGO” assigned to many organisations that actually have a country prefix (and are therefore a national NGO, based either in a donor or a recipient country).
This made me wonder how the types are assigned? They don’t appear on the Registry publishers’ own page, so don’t seem to be self-selected.