In some countries, marriage is considered a completely voluntary and personal matter, and the will to marry must be declared by the parties. However, in cases such as travel, war, or similar issues, it is possible that the woman herself and the man is not able to attend the marriage assembly and express his will in the marriage. Therefore, it is necessary to provide conditions for such persons to have the necessary opportunity to conclude the marriage contract and a person on their behalf or power of attorney. Be able to conclude a marriage for them. For this reason, in this article, we intend to examine the issue of advocacy in marriage, first we will explain the concept of advocacy in marriage, and then we will examine the realm of advocacy in marriage and its various forms.