Learn Danish: Vi sender fakturaen i morgen såfremt arbejdet er færdigt. - We will send the invoice tomorrow provided that the work is finished.

Såfremt is a formal subordinating conjunction meaning 'provided that' or 'on the condition that'. You could replace it with hvis (if), but såfremt is much more formal and administrative. It is commonly used in business or legal contexts, making it a natural fit for a sentence about sending an invoice.

If I wanted to say 'provided the work is NOT finished', where would ikke go?

It would go before the verb: ...såfremt arbejdet ikke er færdigt. Because såfremt introduces a subordinate clause (a dependent clause), it triggers subordinate word order. In Danish subordinate clauses, central adverbs like ikke must be placed before the main verb.

The English translation says 'We will send', but the Danish uses the present tense sender. Is this correct?

Yes, this is very common. Danish frequently uses the present tense to talk about the future, provided the context makes the timeframe clear. Because the sentence includes the explicit time marker i morgen (tomorrow), you don't need to use a future construction like vil sende.

Why does the adjective færdigt end with a -t?

The adjective must agree in gender with the noun it describes. The noun here is arbejdet (the work), which is a neuter noun (an et-word). To match it, the base adjective færdig (finished) takes the neuter -t ending.