Information Required to Receive a Payment

Hello, I'm just make a payment with my client, and my client send the payment via eCash and I must wait for 5-8 days, but after 3 hours from when my client sent it. I got 1 email that tell me about this

"In order to receive this payment, please do the following within 7 days:

- Complete the application form.
- Upload a copy of your government-issued photo ID (such as your national ID card, passport, or driver's license)."

15 minutes after that I receive email again with the same subject but different content like this

"In order to receive this payment, please complete the application form within 7 days."

and all of the email have the "Complete Form" button

so which button that I need to click and which form that I need to fill ? it's confusing and I decide to fill first form because the email coming first
is it make a problem ?

another question is, Is this process can pause the payment waiting times that 5-8 days ?