Western Union has payout limitations depending on location. To find the maximum payment amount, please follow these steps:

1. Sign in to your account at http://www.google.com/adsense
2. Click the My Account tab
3. In the Payment Details section, click 'edit'
4. Select Western Union Quick Cash'
5. If there is a payout limitation, the amount will be listed on this page.

Note that if your payment exceeds this amount, you will receive multiple Western Union payments up to your total payment amount. When this happens, you'll see multiple 'Payment issued' lines, up to the number of payments you received. Each line will have the corresponding MTCN associated with it. Depending on the local Western Union agent, you may have to pick up your multiple payments on subsequent days. If this proves to be inconvenient, feel free to choose a different form of payment.