You don't need to worry about that scenario as this is not verification. The request is for a PCC (Police Clearance Certificate) which checks if there is any criminal history recorded against your name or not till the date when PCC is requested. If you don't have a police history recorded against your name, you don't need to worry. In any case, when the PCC comes it will be given to you and then you need to provide it further. So even if anything goes wrong, you will have the opportunity to get it corrected and then forward it. Hope this helps.