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All SignatureAPI PDF deliverables are sealed with a cryptographic signature. You can verify that a deliverable was generated by SignatureAPI and has not been altered since it was issued. The signature is created using one of these public key certificates:
Serial Number0FE117EE6AF5B1EECC367D06D7845D17
SHA-256 Fingerprint843AA9BB894A3C9956F6CD3F06E0D6E9E43F0A192849977F747F918A1C4F4F7E

Download .cer file

Serial Number2979AC8352AC3B82B72EAA318FFFA49D
SHA-256 Fingerprint815B8B425132FEB359334E4589CC8C7FE78C3F6DC976AB403825DFAC4F0B8CA2

Download .cer file

Serial Number2E8766982802E57E49D02FA3907DCDCE
SHA-256 FingerprintCBD80A0B0B3F212C30590AF00DE75692D11CA9EA49C9B86FD82441BBB0A95BFA

Download .cer file

Serial Number3C2A804C599D18452298B145296FD433
SHA-256 Fingerprint1B:F6:EA:62:5A:52:E5:36:B2:D9:0F:DA:8B:28:0A:41:58:11:80:7D:4F:B9:24:25:3A:A2:E1:84:C1:30:CC:46

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Serial Number533ECFDBD0D3D876C4D452E2268A3F35
SHA-256 FingerprintDC0B3B18804DC36ECE893C4A4D1C03F156C1D14F5991599DD85DFB9F6D1F7F60

Download .cer file

Serial Number5DC2DACB8E8B3A32A387FBBED05FD79C
SHA-256 Fingerprint0638C6E40EB36D081A1FF578BCDB26799C96716CE4C021F3DB9B9CDC79CB0497

Download .cer file

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Verifying in Adobe Acrobat

The easiest way to verify a deliverable is to open it in Adobe Acrobat Reader (free) or Adobe Acrobat (paid). Step 1: Check that the signature is valid. You should see a signature icon with a green check mark and the message “Signed and all signatures are valid.” Valid Signature Message in Adobe Acrobat Step 2: Open the Signature Panel. Click the signature panel to review the signer identity and confirm that the certificate matches one of the SignatureAPI certificates listed above. This confirms the deliverable was generated by SignatureAPI and has not been modified since it was sealed.