The fiscal sponsor must be a 501(c)(3) organization as recognized by the IRS. The fiscal sponsor cannot be an organization whose tax-exempt status is pending. The sponsored project must be able to qualify for exemption under section 501(c)(3), even if the project has no intention of ever applying for it.
Pressing the Ignore button on the listed invitation on the LinkedIn site is effectively a soft rejection. The message then moves to your Archived folder. You can later choose to open the message again and accept the request.
Swearing, creating offensive comments or images, aggressive behaviour and attempt to buy or sell stolen or illegal items will result in your membership being revoked immediately without notification and you will be reported to Facebook and Local Authority with any and all evidence required for prosecution.