From John Scalzi, this is so true:
In the royalty package, a note, on bright yellow paper, warning me and presumably all authors receiving checks from Macmillan, that the check is only good for 90 days, so to be sure to cash it before then.
Which leads me to wonder if the Macmillan accountants need to remember they are talking to authors, the motto of whom, as a general class, is and always shall be cash the check before they change their mind.
When I see that warning on a royalty check, I always snicker. Then I wave goodbye as the check gets sucked into the ATM. My goal in life is to cash checks as quickly as the IRS cashes my tax payments.