Repayments to nominees

In attempting to lodge tax returns where ‘repayment to nominee’ is selected I am being instructed (by the system) that this will fail HMRC’s online filing validation and that the repayment data has to be amended and instead I must advise HMRC by telephone or in writing that repayment is to be made by this method.

Are HMRC or the Government Gateway within their powers to ‘fail’ these tax returns?

Surely if the self assessment tax return allows a taxpayer to ask for the repayment to be made this way then HMRC cannot do anything but accept it

The alternative only serves to delay matters and creates more work – in addition to extra expense to the client – in making often wasted telephone calls or sending letters that go missing.

This just seems to me like another stalling tactic for HMRC to delay issuing...