The following document is a sample request letter used when submitting documents to the GSCCCA for authentication. A credit letter reflects your financial standing with us.The only two ways to get an EIN Verification Letter (147C) is to call the IRS at 1-800-829-4933, or to mail the IRS a written request. Are you requesting a verification letter for a marriage that occurred on or after January 1st, 2014? â–¡ If Yes, please proceed in completing this form. Edit, sign, and share ein confirmation letter pdf online. No need to install software, just go to DocHub, and sign up instantly and for free. A debt validation letter is a written communication that a consumer sends to a debt collector or creditor to request verification and validation of a debt. Sample Collateralization Confirmation Letter; Download this pdf file. Fiscal Year-End Close Checklist; Download this xls file.