The best thing to do is to create a Sales Receipt when the payments are received. Also you can setup items for each royalty payment type so that you have an item to choose within you Sales Receipts with each royalty payment received. These items are mapped to your income accounts. A sales receipt is like an invoice and payment in one. It was not good advice to use Accounts Receivable as your category as someone else advised, this is not proper accounting and such a transaction is only done when you are recording deposit/retainers.
