What sort of documents? I suppose you could carry your work ID card, but that's no proof you're actually going there.
Also, providing essential care to a vulnerable person doesn't have any sort of documentation.
You want to see my work ID, here it is:
(No I didn't forget to upload the image, I just don't have one, nor are the significant number of people who work for SME's likely to have one either, as such even if you do have one you could just say that you don't and there's not a lot that they could do about it).