Do you have questions or concerns regarding Sigma's Henderson Repository that are not fully answered by the content on the Policies and Guidelines page?
Please contact us through one of the following methods.
Business hours are Monday through Friday 8:00 a.m. - 5:00 p.m. (EST).
Voicemail messages and emails are returned within 48 business hours.
- 888.634.7575 (U.S./Canada toll free)
- +1.317.634.8171 International
- Write to:
- Sigma Headquarters | Attn: Henderson Repository | 550 West North Street | Indianapolis, Indiana, U.S.A. 46202