In this case, the procedure mentioned in the documentation using the "Create issued deposit invoice" service does not apply.
It is necessary to fulfill the order using the first procedure mentioned in the documentation, i.e., to create an issued invoice from it with the document type set to deposit invoice.
Example:
<winstrom version="1.0">
<objednavka-prijata>
<id>218</id>
<realizaceObj type="faktura-vydana">
<typDokl>code:ZÁLOHA</typDokl>
<polozkyObchDokladu>
<polozka>
<cisRad>1</cisRad>
<mj>1</mj>
</polozka>
</polozkyObchDokladu>
</realizaceObj>
</objednavka-prijata>
</winstrom>>