If you have reason to believe that there is a PSC or registrable RLE in relation to your company but have not been able to identify them you should consider serving notices, requesting information, on anyone that you know or have reasonable cause to believe knows the identity of the PSC or legal entity or trust or firm, or could know someone likely to have that knowledge.
This could include intermediaries or advisers known to act for them, such as lawyers, accountants, banks, trust and company service providers, or any other contacts such as family members, business partners or known associates.The notices that you serve require a response within one month. Anyone who fails to respond (without a valid reason) commits a criminal offence. If they also fail to respond to an additional warning notice, and the addressee has a relevant interest in your company, then you must consider whether it is appropriate to impose restrictions on any shares or rights that they hold in your company.