Washington state family court, child custody hearing, papers filed papers after hearing, late papers

The issue really isn't whether or not it is permissible to submit documentation following a hearing, the issue is if the Judge took the materials into consideration in making his ruling. I think most judges would never even see the documents, their assistants or the court clerks would simply file the materials in the file. Even if the judge did see the document, the question becomes if the contents of the document influenced the Judge's decision and that would be almost impossible to prove.

It may be a basis for an appeal, if you can document that the materials were submitted after the hearing and the judge relied on the information contained in the documentation in formulating his ruling. Even if you appeal the decision, the fact is in Washington, judges are allowed great discretion in family law cases so you will have to prove that there was an abuse of discretion.