Automatic OP clearing when using an alternative payer

Hello community,

I person the pursuing challenge.
We lone usage FI successful the nationalist cloud. We person the invoices via interface from a pre-system. The unfastened items and payments are past managed successful the nationalist cloud.
We are progressively moving with outgo proposal notes and automatic clearing of unfastened items. In this scenario, we person the occupation that we person antithetic payers. In different words, the lawsuit is the invoice recipient, but the outgo proposal enactment and outgo travel via a antithetic payer. (e.g. cardinal settlement) The unfastened point is for the customer, we person filled the “Alternative payer” tract successful the concern spouse with the corresponding payer. We had hoped that erstwhile processing the outgo proposal note, the strategy would automatically admit that the alternate payer wants to settee the customer's corresponding unfastened item.
Unfortunately, this does not work.

We person lone defined the concern partners with the relation FLCU00 (customer) and bash not usage immoderate income data, and truthful nary spouse roles successful the system.

Does anyone person acquisition with the “alternative payer” relation oregon with the script I person described?
I would beryllium grateful for immoderate ideas.

Thanks successful beforehand for immoderate guidance!

Alex