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If the PayPal field is displayed on the form, it will be redirected to PayPal when the form is submitted. So, you may add a condition to hide the PayPal field when Check option is selected. Please refer to the guide below that can help you with setting up PayPal payment along with other payment option.

https://www.jotform.com/help/120-How-to-Set-up-Paypal-Along-with-Other-Payment-Options