https://portland2013.drupal.org/webform/request-letter-invitation.html
Request a Letter of Invitation | DrupalCon Portland 2013
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https://amsterdam2014.drupal.org/request-letter-invitation.html
Request a letter of invitation | DrupalCon Amsterdam 2014
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https://www.pa.gov/services/pennvest/request-a-letter-of-no-prejudice
Request a Letter of No Prejudice | Commonwealth of Pennsylvania
You can ask for a Letter of No Prejudice (LONP) if you have an emergency like a health or environment issue, or if you need to start building something fast.
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https://prague2013.drupal.org/request/letter-of-invitation.html
Request a Letter of Invitation | DrupalCon Prague 2013
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https://ctsi.duke.edu/resources/request-letter-support
Request a Letter of Support | Duke Clinical and Translational Science Institute
To request a letter of support from CTSI, please complete the intake form. Turnaround time: Please allow at least five business days for letters.
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https://www.coons.senate.gov/services/request-a-letter/
Request a Letter - Senator Christopher Coons
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