Showing a donation that has been made off-line

I have some donors who are in person giving me a check to cover one of the numerous project items I have listed on my fundraising site.

I would prefer not to remove the item from my listings but instead show that the fundraising goal has been met. I think it is more helpful to potential donors to continue to display the other items in my list where the goal has been met.

However, there isn’t anyway (at least apparent to me) where I could update a pledge, partial or full, to an item if it hasn’t populated electronically from PayPal.