This is why I always put the letter in as soon as I'm done.
I think, she has put the/one letter inside, but forgot a second document. Happened to me often enough, especially when sending applications to agencies.
I think, she has put the/one letter inside, but forgot a second document. Happened to me often enough, especially when sending applications to agencies.
And that's went I put it all in and together if it needs to go in the same envelope as soon as it's ready.