What is the most afforable way to change a custoday agreement?

Two parents- custodial Mother living in Florida- Father living in NY- have agreed to a change of custody. Our school district here in NY requires Family court papers with a raised seal to prove custody to enroll a new student. Florida divorce papers are not 50 pages long like NY ones :), it is simply a signed, sealed document.Nowhere on this document is custody mentioned, just a divorce decree.... Parents have agreed minor child should come to NY and live with father.. How do the parents prove this new custody agreement so child can be enrolled in NY school? The court system in our area is very back logged and it could take months to get a date, go to court and Simply change this. We are looking for the fastest, easiest and frugal way to handle this. Thank youWhat is the most afforable way to change a custoday agreement?Try legal aid. Good luck*What is the most afforable way to change a custoday agreement?hmmm since when do public schools want to have divorce documents?. something isnt right here.