Is there a legally mandated filing fee and/or deposit?

Algeria
Answer
No
Source
اﻟﻤﺎدّة 200 : ﺗﻌﻔﻰ اﻹﺟﺮاءات واﻟﻘﺮارات واﻟﺴﺠﻼت اﻟﻤﺘﻌﻠﻘﺔ ﺑﺎﻻﻧﺘﺨﺎﺑﺎت ﻣﻦ رﺳﻮم اﻟﺪﻣﻐﺔ واﻟﺘﺴﺠﻴﻞ واﻟﻤﺼﺎرﻳﻒ
اﻟﻘﻀﺎﺋﻴﺔ
Unofficial translation:
Article 200: all procedures, regulations, decisions related toelection to be exempted from registration fees and judicial fees.