Purchase Certificate
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Purchase Certificate is a currency in Arknights.
Item description
A certificate describing the business and operational capacities of Rhodes Island. Can be exchanged for items.
The operations at Rhodes Island require substantial funding and a variety of materials. Therefore, we must trade in diverse markets in order to keep everything running.
Usage
These certificates are used by Rhodes Island for trading with certain commerce channels to procure more exotic goods not available elsewhere, specifically in the Purchase Certificate Store.
Acquisition
5 
are awarded for completing daily missions (for a total of 35 per week), while 30 are awarded for completing weekly missions.
Regular drops
| Operation | Sanity | Drop(s) | Sanity per drop |
|---|---|---|---|
| AP-1 | 10 | ~5
|
2 |
| AP-2 | 15 | ~9
|
1.67 |
| AP-3 | 20 | ~11
|
1.8 |
| AP-4 | 25 | ~15
|
1.6 |
| AP-5 | 30 | ~20
|
1.5 |