Because minors are not able to enter into legal agreements, a credit report should not exist under their social security number. You can check your child's credit history if you suspect fraudulent activity may have occurred.
All three credit reporting agencies have special procedures in place to run manual searches on minors. If your child is under 16, you can request a free credit freeze, also known as a security freeze, to make it harder for someone to open new accounts in your child's name. The freeze stays in place until you tell the credit bureaus to remove it. (Minors who are 16 or 17 can request and remove a security freeze themselves.) To activate a credit freeze, contact each of the three credit bureaus.
Equifax: Contact Equifax for more information
Experian: Contact Experian for more information
TransUnion: Contact TransUnion for more information