our accounting methods regarding payment of freelance contributor royalties against spot sales and permissions is as follows:
SLM makes only one royalty payment to a contributor per licence.
If the customer fully pays the invoiced licence fee, the royalty is paid out in full (usually 50% but this can vary)
If the customer has only partially paid the invoiced licence fee 90 days following the issue date of the licence, then a pro rata amount of the royalty fee is paid out. SLM will not make a further royalty payment to the contributor if further fees are received from the customer after 90 days.