Will a Schengen visa application be declined without an employment certification for my partner from Thailand?

A user from the Netherlands is concerned about their Thai partner's upcoming Schengen visa appointment, lacking an employment certification from her workplace, the Navy. Despite having all other documents, they worry whether the absence of this certificate will result in a visa denial. Commenters suggest that while the certificate is important, it may not be strictly necessary if adequate evidence of intent to return to Thailand can be provided, indicating alternative ways to demonstrate employment status.