Is my LPA receivers letter of appointment validly authorised?

I know that LPA Recieves do not have to be appointed by deed, but the document appointing them must be validly authorised. My LPA receivers were appointed by the Kent Reliance Building Society and the Letter of Appointment was signed by one director and not sealed or witnessed.

Current information on the Council Of Mortgage Lenders website states, under ‘What form of attestation clause does the lender use?’ that what applies to Kent Reliance (a trading name of One Savings Bank) is:

‘Signed on behalf of OneSavings Bank plc
Acting as its *Director/*Attorney
(please delete as necessary)

In the presence of:
Witness Name:
Witness Address:
Witness Occupation:

My receivers Letter of Appointment in May 2010 was signed by only the financial director and was not witnessed or sealed and I wondered if anyone has any information that would help me ascertain if it is validly authorised.

I have the Kent Reliance rules at the time which states that if the seal is affixed to a document then the document is deemed to have been signed on behalf of the society, but I don’t know if that helps me.

Please can anyone help?

Joan