Pay attention to the sentences below:
If you meet the requirements, you can apply for a payday loan. (I think you should meet the requirements so that you can apply for a payday loan)
The word “if” can be replaced by these words:
as long as
assuming (that)
on condition (that)
on the assumption (that)
provided (that)
supposing (that)
unless
with the condition (that)
What about this:
When you meet the requirements, you can apply for a payday loan.