From the Microsoft Dynamics GP Support Blog comes news that Receivables Management Transction Unapply Tool in the Professional Services Tools Library is now available!
Receivables Management Transction Unapply Tool in the Professional Services Tools Library is now available! – Microsoft Dynamics GP Support Blog – Site Home – MSDN Blogs
Microsoft & the GP EcosystemPayables & Receivables
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.