Possible Clues:

• Write a check for later
• Occur later than
• Follow in time
• Write a check to be cashed later
• Make later change to normal schedule
• As potted (anag)
• One way to check payment by cheque?
• Prepare for later, in a way
• When to get the letter off to be cashed later
• Put 12/31/2020 on checks, say