F03B13Z1 RUICU (batch number) field
We make use of Automatic Receipts Processing and load not only F03B11Z1/F0911Z1 then run R03B11Z1A but then we load F03B13Z1 with receipts/applications in order to close those previously loaded/open invoices by running R03B551.
We've been populating the optional RUICU field on F03B13Z1 with the current date (i.e. 20150130) for the entire batch of loaded transactions (which are really separate and distinct business transactions made up of an RU record and one or more RI records).
Using the current date makes a single batch (F0011) for review and subsequent post by batch.