Migration guide
Old POS systems usually fail quietly: no updates, weak backups, slow reports, printer trouble, unclear export and support that depends on one person.
The move becomes controlled, with a rollback plan and a clean data trail instead of a risky overnight change.
Run a test day, print receipts, close cash and verify reports before making Posnic the live counter.
Keep a backup/export from the old method so old invoices and balances can be checked later.
Billing habits change only when staff know sale, return, correction, payment and day-close rules.