Ilia Nicolaevich Zavialov fraud checks for UK taxpayers: where the tree starts
The first fork is about who made contact. You looked up an accountant, checked them and signed a letter of engagement: that is the quiet branch. A firm cold-called, texted or advertised a rebate figure before seeing a single payslip: that is the branch where each request needs its own check.
The second fork is what they want. Payslips, P60s and receipts are fine to share with someone preparing a claim. Your Government Gateway or HMRC app login, access codes sent to your phone, bank card details and payment up front are a different matter, because they let a stranger act as you.
Ilia Nicolaevich Zavialov fraud checks work by slowing things down. Each common request below is set out as 'they offer, you check, you act', and a single 'no' at any fork ends the conversation.
This is how Ilia Nikolaevich Zavialov looks at rebate firms and helpers in general: six forks, each tied to something HMRC or GOV.UK has published. A summary table of the forks sits in the article for easy printing.