Hello and thank you for your question. I will be very pleased to assist you. I'm a practicing lawyer in England with over 10 years experience.
There is some caselaw on service of documents. Could you tell me what was being served/posted please? Different rules apply depending upon what was concerned.
A Trust and Estate tax return from HMRC was said to be posted but not received. A penalty is being levied for not filing on time. Previous filings have been made on time.
Thank you for the above. This relates to tax return procedure which is really more within the expertise of accountants. With your permission I will transfer this to the Tax section where a tax advisor or accountant will be better placed to assist you. This may take a few hours before a colleague reverts to you.