Quick answer: Label a physical photograph on its archival sleeve or enclosure, not on the image surface. Record who is pictured, the place, an exact or estimated date, the event, and where the information came from. For a digital copy, use a clear filename and add a caption or IPTC metadata when your software supports it.
A useful label turns an unidentified image into family history. The safest method also protects the original from pressure, ink, adhesives, and repeated handling.
What information belongs on a photograph label?
- People: full names where known, preferably left to right, plus relationships if helpful.
- Place: city, region, country, or the most precise verified location.
- Date: exact date when documented; otherwise “circa 1968” or “probably 1960s,” not an invented exact date.
- Event or context: wedding, school, workplace, vacation, or why the picture matters.
- Source and confidence: “identified by Aunt Maria, 2025” or “unconfirmed.” This helps future readers distinguish memory from evidence.
- Collection ID: a short unique code, such as FAM-0042, that connects the print, scan, and notes.
Example: FAM-0042 — “Elena and David Lewis outside their home in Dayton, Ohio, circa 1972. Names supplied by their daughter, May 2025; date estimated from family records.”
How to label a physical print safely
- Place the photograph in a suitable archival sleeve or paper enclosure.
- Write the identifying information and collection ID on the outside of the enclosure, away from the print. Let any writing dry before inserting a photo.
- Keep a matching list or digital catalog if the caption is too long for the sleeve.
- Store the labeled photograph in a stable, cool, dry location.
The Library of Congress recommends marking a photograph’s housing material whenever possible. If direct marking is absolutely necessary, its guidance limits this to the back near the edge with a soft graphite pencil. The U.S. National Archives notes that some photo papers will not accept pencil, so the enclosure is often the better place for a caption.
What not to write on or attach to a photograph
- Do not write on the image side.
- Avoid ordinary ballpoint pens, felt-tip markers, and pressure from writing on the back. Ink can transfer, and pressure can show through on the front.
- Do not apply sticky labels, tape, glue, paper clips, or rubber bands to the original.
- Do not separate a photograph that is stuck in an album just to add a label. Label its page or a nearby enclosure and record the album location instead.
Specialized marking materials exist for professional collection work, but a consumer “archival” pen is not a universal choice for every print or film type.
How to name and describe digital photo files
Use a consistent filename with an ID, date or approximate date, and short subject. For example: FAM-0042_c1972_Lewis-family-Dayton.tif. Keep the original scan unchanged; make edited versions with a suffix such as _restored. A filename alone cannot carry a full story, so keep a catalog entry or embedded caption as well.
The IPTC Photo Metadata User Guide describes fields for captions, people, locations, dates, and rights. If your editing software supports IPTC metadata, add a concise description and names there. Verify that the information remains in an exported copy; some sharing services strip metadata. Also maintain a separate index and backups for long-term access.
Labeling negatives, slides, and albums
Label the sleeve, mount, or box rather than the film image. Keep a unique ID consistent with any matching print and scan. For an album, record the page number and position (“page 12, upper right”) so the information remains useful without removing photographs. If a print needs cleaning or is stuck to another surface, see our photograph care guide before handling it.
A short workflow for a large family collection
- Sort photos into small groups by album, family branch, or event.
- Give each original a unique ID and label its enclosure.
- Scan it and use the same ID in the filename.
- Ask relatives to identify people; record who provided each identification.
- Back up the scans and the index in more than one place.
- Keep irreplaceable originals in suitable photo-safe storage. If you later reduce duplicates, use our photo disposal guide to protect privacy and check local recycling rules.
Frequently asked questions
Can I write on the back of an old photograph?
Labeling the enclosure is safer. If direct marking is unavoidable, consult the photograph’s material and use preservation guidance; a soft graphite pencil near the back edge may be suitable for some paper prints, but not all surfaces accept it.
What if I do not know the exact date or person’s name?
Write “unknown” or mark an estimate clearly. Record why you think a date or identity is likely, so future family members can reassess it.
Is a filename enough to preserve the story?
Usually no. Use a short filename for retrieval and a caption, IPTC metadata, or a collection index for full names, context, and source notes.
Should I add a sticky label to a slide mount?
Avoid adhesives touching valuable originals. Label its storage sleeve or box and cross-reference a collection ID.
Sources and editorial method
This guide draws on the Library of Congress photograph-care guidance, the National Archives’ family-photo advice, and the IPTC Photo Metadata User Guide. The sample labels are illustrative; no physical collection was tested for this article.