If you are married and your family situation has changed, you should notify the Collection Department of the National Insurance Institute near your place of residence in order to modify your marital status.
Moreover, to take up your rights as single mother at the National Insurance Institute, please find attach a link to this page on our website “Rights by Population Groups – Single-Parent Families”
A single-parent family is defined by the Single-Parent Families Law as "a parent who is unmarried and has custody on a child who has not yet reached 18 years of age." Families that meet this definition may be eligible for benefits under the National Insurance Law and other laws implemented by the National Insurance Institute.