Does credit report update the same day a company reports to them?

I negotiated a pay to delete with a collection company. They told me the date that they will report. Will it drop from my credit report that day or will it take time from the date that they tell the bureaus to delete it?

Does credit report update the same day a company reports to them?
As soon as it reports it should go away. Send a fax of the negotiation letter over to the 3 major bureaus if it doesn't disappear as you were told.