> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slash.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Timing

> Submission timing and scheduled ACH transfers.

ACH processing is asynchronous. A successful create response means Slash
accepted the instruction; it does not mean the receiving bank settled it.

When a Transfer is scheduled, `status` is `scheduled`. Before network
submission, `ach.submitsAt` may identify the planned submission time. Once
processing begins, use the Transfer lifecycle rather than calculating a
settlement deadline from `createdAt`.

Banking days, network windows, reviews, approvals, and returns can all affect
timing. Do not promise availability based only on elapsed wall-clock time.

Rail fields such as `companyEntryDescription`,
`companyDiscretionaryData`, and `addenda` are sent to ACH processing. The API
rejects values longer than 10, 20, and 80 characters, respectively, before
creating the transfer, with `400 invalid_request`. A value within those length
limits can still fail at submission if it violates another network rule.