If I have a bad credit score, will it affect my fiancé's score if we get married?
Credit scores are calculated on a specific individuals credit history. By getting married, you will not affect your fiancés score.
However, if you and your fiancé open a joint credit card or obtain a joint auto loan or mortgage, or if you are an authorized user on your fiancés credit account, that could affect your fiancés credit score.
But the bottom line is that any account your fiancé opens solely in his or her name will not be affected by your credit status.