I am getting error like security header is not valid

[deepit]

Hello,

When I pay big amount then getting below error, but for low amount like 20 to 50 usd then it's working fine.

Error like security header is not valid.

So can you tell me why this happen for me

I tried everything, account is fully verified.

[Renuka3]

Hi   @deepit 

Welcome to community.

I'd recommend reaching out to our Customer Support teams by clicking "Contact" at the bottom of any PayPal page for further assistance.

Renuka.