It is for an insurance claim to get my lens fixed. Sigma said it was impact damage so not covered by the warranty. Grrr.
The utility bill had already been used as proof of address so I scanned my birth certificate as that is usually what usually gets requested.
Then I thought having that does not really prove much, although then again when posting copies what does as anything could be faked? So I also scanned my old railway season ticket photo ID to be on the safe side.
Just have to hope that is enough now.
Michael.