I have made several conditional vows but I did not fulfill most of them.
For example, I vowed to do such and such if I succeed, work, and so on. Must I fulfill these vows?
When the condition of the vow does not come true, you are not obliged to fulfill the vow. However, if it does happen, you have to fulfill the vow providing that it is an act of obedience. (Part No. 23; Page No. 273) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.