Why am I being asked to upload the ID of other people on the same case? (Only applies to the representative on the case)

If you are asked to upload ID on behalf of others on the case, it is because your adviser has opted for this

As a representative on a case, you may find that after filling in your own personal information and answering the questionnaire about the company, you will be asked to fill in personal information and upload photo ID on behalf of other people on the case. This is something that your advisor has chosen when creating a case. This is often because the adviser wants to involve as few people as possible.

If you have been asked to do this, but do not want - or have the opportunity - to do this, you must contact your adviser, who will be able to change this.