but you can’t have evidence of something that’s not true? There’s no evidence for you to present. I’m assuming you mean conflicting claims? And you already know that they don’t stick with the original claimant. If they did you wouldn’t have lost one lot of child benefit already.
how old are your children? Are you not concerned that if this goes too far, they may be asked where they were? Would you want them to find out you lied?
edited to add, because it was balance of probability and not beyond reasonable doubt my acquaintance was advised that text message between them and the child, a photo of them that was identifying of the date, and Uber eats receipts would potentially be considered.