A direct equivalent can be found in Latin argentum Dei (DMLBS 124a); the term is presumably synonymous with English God's penny n..
s.
1finan.merch.'God's silver', earnest money, deposit towards a purchase or hire in order to confirm an arrangement:
(
1407-8
)
en godis silver et doné as povres tenauntz .x. d.
8 Henry IV
(
1409-10
)
Item payé pur un batew achaté de Nicolaus Hobbe le quel fut mellys de Strode, pris .xxvj. s. .viij. d. Item en Goddisselver et en bevereche .iij. d. ob.
84
Goddisselver (1407-8)