INTM330320 | Double Taxation applications and claims: signature of declarations: Declarations signed by an attorney on behalf of an individual
From HM Revenue & Customs · International Manual
Generally you should not accept declarations on claim forms signed by an attorney on behalf of an individual. However if a claimant is unable to sign the declaration because of a disability or illness or is not capable of looking after his or her own affairs you can accept a claim where
you have an explanation why the claimant was unable to sign the declaration
and the person who signed the declaration satisfies one of the following conditions
holds a Power of Attorney and has full knowledge of the claimant’s affairs
is someone who has detailed knowledge of the claimant’s affairs, for example a close relative
has been appointed by the Courts
holds an Enduring Power of Attorney where the Power of Attorney was granted when a person now mentally incapacitated was still capable of understanding his/her affairs.
You should refer to Specialist Personal Tax, PT International Advisory any case where
you have doubt about accepting the signature of a person other than the claimant
someone questions our decision not to accept a claim or application where a person other than the claimant, or applicant, has signed the declaration
the circumstances are not specifically covered in this guidance.