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Customer Service

800-221-5175 (9 a.m.– 6 p.m. ET, M–F) 


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Mailing Address

William H. Sadlier, Inc. 
Attn: Customer Service 
25 Broadway 
New York, NY 10004-1010

Email Guidance

Please be alert to the security of your information. As a reminder of our practices and due to the prevalence of fraud, please confirm any updated wiring instructions or changes to payment information by calling our office directly. If you receive an email containing wire transfer instructions or requesting changes to an invoice, call us immediately to verify the information prior to sending funds. Additionally, should you be a recipient of any suspicious email, remain vigilant and do not click on any link or download any attachment contained in the email without first verifying the legitimacy of the link or attachment with a known Sadlier contact.

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