How To Write A Check To Two Parties . If they don't have a joint account they have three options: For example, if your check is for $8.15, put the “8” as far to the left as possible. Expert Advice on How to Endorse a Check wikiHow from www.wikihow.com If you get approval, endorse the back of the check by signing it. How to do sign a check to someone else. Writing your title (president, owner, treasurer, etc.)