to be sure, you no longer have the letters ? They were in your household inventory and not your Sims inventory ?
Does your household have businesses or a lot of collections. If the letter is stuck in your household inventory, you can try cleaning it out by creating a new household and moving all Sims over to the new one but that will make you loose all businesses, everything in the household inventory + all collection items you don't have saved in your inventory. Do try on a backup and not your regular save if you want to see if that works.
Yes they went into my household inventory, and when I tried to read them to see if my sim could receive scholarships, they did not have the option. Hoovering over them also left them blank.
The household did not have any businesses, but maybe 5 collectibles around the house that I marked as heirlooms.
I just moved the next generation I'll be playing out. Hopefully this will help.
Just make sure you move them to a new household. Like do it in the household manager and create a new household in the right hand side and then move the Sims over to that.
