You should request a higher rate for the days you've worked last weekend.
You should request for a higher rate for the days you've worked last weekend.
I have no doubt that the first sentence correct. What about the second? It looks like a mix-up between "request" and "ask for".
If it's also correct, is there any difference in meaning? When should which be used?
This question is about the verb only. If "request" is a noun ("a request for more money") "for" is obviously necessary.