Receivables summary - new field to capture follow up info

After an invoice is posted, we receive follow up info from the charterer's (counterparty) handling the claim to show which location (office) is going to deal with it.

Currently, we don't have somewhere to add this supplementary information into the laytime / freight  invoice / rebill invoices / other revenue and expenses user interfaces.

We need to capture this supplementary information on the office handling a claim somewhere in the interface so that we can filter on it in the receivables summary page and follow up on these claims with the correct offices to settle them.

Due to the complex setup of offices for our counterparties, we currently cannot capture this in IMOS to follow up and it needs to be maintained in a separate excel sheet outside of the system.