If you prove the fact of supporting 3 children, you are entitled to a deferment. Evidence of the maintenance of a non-native child will be a death certificate of his biological father, documents that the child lives with you.
In accordance with Clause 3, Part 1, Article 23 of the Law “On Mobilization Preparation and Mobilization”, women and men who are dependent on three or more children under the age of 18 are entitled to a deferment, except for those who have arrears in alimony payments, the total amount of which exceeds the amount of payments for three months.
If the documents are indeed falsified, you have the right to refuse to undergo combat training.
To confirm a child's disability, you must provide:
a medical certificate for a child with a disability under the age of 18 in a form approved by the Ministry of Health, or an individual rehabilitation program for a child with a disability, issued by the medical advisory commission of a medical and preventive institution; to confirm family relationships with parents (for biological parents)
a birth certificate of a child indicating the paternity of the conscript; to confirm the powers of a guardian, trustee - a decision of the district, district in the cities of Kyiv and Sevastopol state administration, an executive body of a city, district in the city (in case of formation) council, village, settlement council of a united territorial community or a court decision on the establishment of guardianship, custody and a birth certificate of a child; for adoptive parents - a court decision on adoption and a birth certificate of a child indicating the paternity of the conscript.