Until an invoice has been issued, there is no obligation to pay, but once you issue the invoice to the client, they are required to honor it, and it cannot be ignored.
However, there are times when a client may forget to issue an invoice, and in such times, you may decide not to pay.
Well, it may not work because they still have proof that they delivered the goods or provided a specific service, so it’s best if you remind them that they have not issued an invoice for payment, and especially when you wish to keep working with them in the future.
If, as a client, you have forgotten to issue an invoice, you may be worried that it is too late for you to receive the cash and maybe to think that you have lost money. Do not worry about that. The official UK rule is that you can claim an unpaid debt for up to six years.
This rule can be found under the limitation act of 1980. The specific limitation is outlined for the creditor to pursue their debt from a debtor for that period, which is an invoice’s statute of limitation.
However, when this time has elapsed, and no payment has been made on the invoice whatsoever, the client may choose not to pay it after all since the statutory period has expired, and the invoice or debt is no longer valid.
Therefore, it is prudent always to issue an invoice immediately after work is delivered; otherwise, you may end up in a long battle with the client trying to get paid.