[Home](./index.md) > [@digitalpersona/services](./services.md) > [SearchQuery](./services.searchquery.md) > [filter](./services.searchquery.filter.md) ## SearchQuery.filter property A search filter. Check https://msdn.microsoft.com/en-us/library/aa746475(v=vs.85).aspx for LDAP filter syntax. Signature: ```typescript filter: string; ```