Subject: Just a few donations away.
Dear friends and family,
I am extremely close in reaching my goal of fundraising [goal] for [charity name]. It is impressive how many people have helped me to get this far. The most sincere thank you to all of you.
However, I still need your support to accomplish the goal 100%. So, for the last time, please help me to make this world a little bit better. Every penny counts. You can make a huge difference just by donating to my fundraiser or by sharing my fundraising page with your network. Click the like or tweet button, write a short description, and inspire people to support XXXcharity.
[Tip: add a link to your fundraising page]
Don't forget: [charity] will use this money to provide [write about the cause] …
Thank you for your support!