You cannot send an invoice you wrote

Write the invoice. Then ask somebody else to send it. LEAT will
refuse if you try to do both.

The mistake

You create an invoice, check it, press Send, and LEAT says
somebody else has to send it. Nothing is broken. The rule is
doing its job.

Why

Sending an invoice is the moment LEAT claims money from
somebody. A claim that one person can write and issue alone is
a claim nobody has checked.

Two sets of eyes is the oldest control in accounting, and it is
the one an auditor asks about first. It costs a minute. It is
the difference between a mistake that gets caught and a
mistake a client finds.

What to do

Ask a colleague who has Income access to open the invoice,
read it, and press Send. They are saying the numbers are right,
so give them a moment to actually look.

There is no amount below which this stops applying

A small invoice is checked the same way as a large one. Nobody
has set a threshold, and a threshold that has not been agreed
is a number somebody invented.

Recurring invoices are no exception

A recurring invoice prepares its copy as a draft. Nothing
reaches the client until a person opens that draft and presses
Send, and that person still cannot be the one it belongs to.

The recurrence saves you the typing. It does not make the
claim for you.

If a recurring invoice needs to change, change the original.