Heather Howey (asker) Jul 14, 2023:

Thanks for your ideas, all. I think though it is unlikely the creator of the online form simply used an old phrase used on paper forms, so I have chosen Adrian's suggestion, as i think it makes total sense.

JaneD Jul 13, 2023:

I don't think it means "using letters", I think it's more "in block capitals", but even that doesn't apply for an online form, unless it's one that they can fill in using a device that allows for handwriting. So it's probably an old conversion from a paper form and you can ignore it.

Christopher Schröder Jul 13, 2023:

It’s a very English-sounding sentence so I suspect you are right and it’s a poor translation into Swedish