Certificate Expiration

An exemption certificate is not permanently good. Depending on the jurisdiction and the certificate type it may carry an explicit expiration date, may lapse after a fixed period, may need periodic renewal, or may remain valid until revoked. What is consistent across all of them is who bears the consequence: the seller, whose untaxed invoices after the lapse are the ones an auditor assesses.

The operational danger is that expiry is silent. Nothing happens on the day a certificate lapses — no order is blocked, no invoice fails, no customer calls. Business continues exactly as before, and the exposure accrues invisibly at the rate the customer buys. This is why certificate lapses are typically discovered in an audit rather than in the ordinary course of business, and why the amount at stake is usually months of sales rather than one order.

Managing expiry well means holding the date as data rather than leaving it inside a PDF, monitoring it on a schedule rather than by memory, and starting the renewal conversation before the date rather than after. It also means knowing which of your certificates carry a date at all: a certificate with no stated expiry is not a certificate that never needs review, only one whose review date you have to set yourself.