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| Title | Notice to Sender of Undelivered Mail |
| FormNumber | 3540 |
| Revision | c1913 |
| Division | |
| WhereUsed | Notice to Sender of Undeliverable 2nd or 3rd Class Mail Being Held pending receipt of Postage to cover the Return |
| EKU | 1899 DLS |
| LKU | 1935 DLS |
| Notes | U.S. Domestic Postal Rates, p222.
Lined border around edge of card, used 1913. |
| Source | SS |
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