i.
One book, two stamps
Pick the issuing entity at draft time. Each entity has its own gap-free number sequence (INV-2026-00001 …). Customers are shared, invoices aren't.
SNSSourcing
Hong Kong · Singapore
A ledger for two entities, kept in one place
Invoicing for SNS Sourcing — HK and SG, in one quiet admin.
Issue invoices, credit notes, and debit notes from either SNS Sourcing Ltd. (Hong Kong) or SNS Sourcing Pte. Ltd. (Singapore). Numbers are gap-free per entity. Customers are shared. The PDF is archived for seven years, automatically.
ii.
Frozen at issue
Once issued, a document is sealed — name, address, totals, every line. Edit a customer or product later and the original document never blinks.
iii.
Spoken to Claude
A remote MCP server lets you say 'draft a credit note for Acme, partial refund' and watch a PDF land in the inbox. No app to open.