Cancel invoice
Cancel an issued invoice by creating a storno invoice with a reason.
MCP tool szamlazz_hu_write → cancel_invoice
write Confirm
Creates a storno invoice for the original, with the same delivery date, and adds your reason to it. Returns the storno invoice number and the amounts. The storno is a legal document that goes to NAV, which accepts it only if the original was submitted successfully. A storno made by mistake is fixed in the app, not by this tool. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| invoice_number string required | string | Invoice number as shown in Outgoing invoices, from list_invoices. |
| reason string | string | Reason for the storno, printed on the storno invoice. |
tools/call
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "szamlazz_hu_write",
"arguments": {
"operation": "cancel_invoice",
"arguments": {
"invoice_number": "ABC-2026-00131",
"reason": "Duplicate order"
}
}
}
}Example response
{
"content": [
{
"type": "text",
"text": "{ ... same JSON as structuredContent ... }"
}
],
"structuredContent": {
"storno_invoice_number": "ABC-2026-00149",
"original_invoice_number": "ABC-2026-00131",
"reason": "Duplicate order",
"gross": -127000,
"currency": "HUF"
},
"isError": false
}