Are you looking for the time it takes for checks to clear? Float times? Currency exchange timing? What region or regions are you concerned with? Keep in mind that in Europe, most (above 90%) business payments are made electronically, not with checks.
If you have a specific question or questions, one of our experts with a good bit of international experience can address it. In the meantime, here are a few resources you might find helpful.
On The AP Network:
• Foreign Currency Exchange Calculator
• Case Study: Making Strategic Payments in Three Currencies
Also of possible interest: