If Raggedy Anne wants to pursue the matter she could send an email to
marty.flanagan@invesco.com . Invesco is large and has many diverse operations in the UK, so go to the top, the CEO in the USA.
Concisely explain the problem and ask for the rationale for a certified copy to be dated less than a year ago.
Quote the following:-
3 Proof of instruments creating powers of attorney.
(1)The contents of an instrument creating a power of attorney may be proved by means of a copy which—
(a)is a reproduction of the original made with a photographic or other device for reproducing documents in facsimile; and
(b)contains the following certificate or certificates signed by the donor of the power or by a solicitor [F4, authorised person ] or stockbroker, that is to say—
(i)a certificate at the end to the effect that the copy is a true and complete copy of the original; and
(ii)if the original consists of two or more pages, a certificate at the end of each page of the copy to the effect that it is a true and complete copy of the corresponding page of the original.
...
http://www.legislation.gov.uk/ukpga/1971/27
as evidence of the legal requirement in the UK.