hello welcome to the forum Quick1978... if and when she got a stamp on her passport for being an overstayer just be honest and tell the embassy about it by stating and reasoning it out in your support letter for her..cause there's a question on the form that ask ....6.6 H Have you ever been deported, removed or otherwise required to leave any country, including the UK in the last
10 years? Put a cross (x) in the relevant box
Date Country Reason, but if she can avoid having a stamp in Belgium the better.