Thank you for the information. A payment increase or reduction occurs when your income changes by an amount exceeding 25%. However in addition to this a gift should not exceed £3000. You will want to provide the information they have requested and comply with their instructions. However, in general cash gifts are not included as income. This could have been an automatic trigger as the amount entering your account exceeded the standard. However it will be up to the CMS too look at this.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
https://www.lawsoc-ni.org/solicitors (N. Ireland)
Hopefully, I have answered your query in a way that is simple and easy to understand. If anything remains unclear, I will be more than happy to clarify it for you. In the meantime, thank you once again for using our services.
Should you require any further assistance on this matter, please do not hesitate to post a further questions for additional assistance.