Can a Masjid Mutawalli use Masjid funds to give plaques to people who served the Masjid?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
If the funds were given to a specific project, like for building classrooms in the masjid, then it is not permissible to use it for other things.
But if it was given as general sadaqa to the masjid, it can be used to give it to the staff and volunteers in the mosque. It is important that there is no exaggeration in the presents and the bonuses that are given to the volunteers and staff.
Only Allah knows best
Written by Maulana Selim Saldiran
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 Fatawa Qādī Khan, 3/165-197 & Majma’ al-Damānāt, 1/327