Just been trying to sign up to SS and they are asking for a scan of passport or similar ID (wish they'd ask at the beginning and not end of registration) - I've not been asked by any other sites for this.  What is this all about and is it legit?

Just had an email from StockXpert asking for me to upload more shots as part of my initial submission. They say the shots I submitted look soft, and may not be focussed...probably due to the fact they are digital pics and have not had sharpening applied from RAW to Jpeg.  Do they normally require pics to be sharpened before submitting...other stock sites do not and have accepted the same pics.

Any advice welcome