What PAM is (and what it is not)
Partially Addressed Mail occupies a specific, defined position in Royal Mail's product catalogue. The name can mislead: it does not mean mail where the address is incomplete or partially known. It means mail where the address is fully correct but the recipient is identified only generically, not by name.
A PAM item has a complete, deliverable address: house number or name, street, town, and postcode. What it lacks is a named person. The salutation line reads something like "The Resident", "The Householder", "The Occupier", or "To the Business at this Address". Royal Mail's specification also requires that the sender's identity appears on the piece and that a response channel or opt-out mechanism is accessible to the recipient.
PAM is not the same as a generic "unaddressed" leaflet. Unaddressed items have no delivery-point address at all; they are distributed by Royal Mail's Door to Door service to every household in a postcode walk, in every walk within a postcode sector, or across an entire postcode district. PAM carries a real address on every item. That distinction matters for targeting precision and for postal tariff purposes.
PAM is also not the same as fully addressed Advertising Mail, where the item carries a named individual's title, first name, and surname alongside the address. Fully addressed mail is eligible for more personalised copy treatments, higher response modelling, and in some cases higher response rates from warm prospect files. PAM trades some of that lift for lower cost and a simpler data and compliance footprint.
What are the eligibility rules for Royal Mail PAM?
Royal Mail publishes its PAM product specification as part of the Advertising Mail terms. The core requirements are straightforward, but each one is a hard gate: miss one and the mailing either fails at acceptance or loses the PAM rate.
Greeting format
The piece must carry a non-personalised greeting. Accepted phrasings include "The Resident", "The Householder", "The Occupier", "Dear Resident", and similar generic forms. You cannot use a first name, surname, title, or any identifier that implies you know who lives at the address. Even a phrasing like "Dear Homeowner" is acceptable; "Dear Mr Smith" is not, because it implies individual identification and would push the item into Advertising Mail territory.
Address completeness and format
Despite the non-personalised greeting, the delivery address must be a valid, fully formatted Royal Mail address including a correct postcode. PAM items must be produced in barcoded format, either Royal Mail Mailmark barcode or standard CBC (Customer Barcode). Unbarcoded items do not qualify. The address file used to drive print must be current; Royal Mail recommends an address validation step against the Postcode Address File (PAF) before production to avoid address errors that would trigger undeliverable returns.
Mailing Preference Service suppression
This is the step most often overlooked by first-time PAM users. Royal Mail's product terms require that the address file is washed against the Mailing Preference Service (MPS) register before the mailing is produced. The MPS allows UK residents to register their address as opted out of unsolicited direct mail. Because PAM does not carry a named individual, the suppression runs at address level rather than name-and-address level. Any address whose occupant has registered with MPS must be removed from the file before print. Failing to run this suppression is a breach of the Royal Mail product terms and also exposes the sender to complaints to the Information Commissioner's Office (ICO) under UK GDPR, since the MPS is recognised in ICO guidance on direct mail as a standard industry opt-out mechanism.
Volume minimums
PAM requires a minimum of 1,000 items per posting. Mailings below that threshold do not qualify and are charged at standard Advertising Mail or retail letter rates, which removes the cost advantage entirely. Most commercial direct mail campaigns work at significantly higher volumes, but for a small regional test the 1,000-item floor is worth confirming against your projected address counts before committing to PAM format.
Sender identification
The mail piece must clearly identify the sending organisation by name and, typically, with a return address or contact detail. Royal Mail requires this as a condition of the product; the ICO's direct mail guidance echoes it as a transparency requirement under UK GDPR. Anonymous marketing mail is not permitted under either set of rules.
PAM vs Door to Door vs Advertising Mail: a comparison
The three Royal Mail products for consumer acquisition campaigns serve different purposes. The table below sets out the practical differences across the factors that matter most to campaign planners.
| Factor | Door to Door | Partially Addressed Mail (PAM) | Advertising Mail (fully addressed) |
|---|---|---|---|
| Address on item | None (unaddressed) | Full address, no name | Full address plus named recipient |
| Greeting | None, or "Dear Resident" | "The Resident", "The Householder", etc. | Named salutation (e.g. "Dear Mr Jones") |
| Targeting granularity | Postcode walk (every household in a walk) | Individual delivery point within a sector | Individual delivery point, by named person |
| MPS suppression required | No (unaddressed, so MPS does not apply) | Yes, at address level | Yes, at name-and-address level |
| Personal data on item | No | No (address is not personal data on its own) | Yes (named individual) |
| Relative postage cost | Lowest | Mid (20-35% below Advertising Mail) | Highest |
| Can exclude specific addresses | No (whole walk or nothing) | Yes | Yes |
| Can select by property type | Limited (walk-level only) | Yes | Yes |
| Min. volume (Royal Mail) | 500 items per walk | 1,000 items per posting | 1,000 items per posting |
| Personalised copy possible | No | No | Yes |
For most high-volume acquisition campaigns where you have a strong geographic or geodemographic selection but no named-individual file, PAM is the natural choice. It beats Door to Door on targeting precision and gives you the ability to exclude business addresses, MPS-registered properties, or low-propensity delivery points. Against fully addressed Advertising Mail, you trade the ability to personalise copy for a material saving on postage and a simpler data supply chain.
How does PAM targeting work at postcode sector level?
The core targeting input for a PAM campaign is a list of delivery points drawn from the Postcode Address File (PAF). PAF is Royal Mail's definitive database of all UK deliverable addresses, updated monthly. For a PAM build, you start by selecting the postcode sectors (the area defined by the first four characters of a postcode, for example SE1 7) that match your campaign geography.
Within those sectors, you can apply filters to the address list. Common filters include:
- Residential versus commercial (PAF classifies each delivery point by premise type, so you can strip out registered businesses and retain only residential addresses, or the reverse for a B2B-oriented campaign)
- Property subtype, such as flats versus houses, where the campaign offer is property-specific (a boiler replacement offer targeted at houses rather than flats, for instance)
- MPS-registered addresses, which must be removed before production
- Exclusion of your own existing customer addresses, to avoid mailing people you already hold on a CRM file
The result is a file of delivery points that is address-complete, MPS-clean, and shaped to your campaign criteria. No individual name is attached to any record. The file is handed to a print and production house, which prints each item with the address from the file and a generic greeting, barcodes to Royal Mail specification, and presents the mailing at the Royal Mail acceptance point.
Geodemographic selection within PAM
PAM becomes considerably more precise when you overlay geodemographic classifications onto the address universe. Classifications such as ACORN (built by CACI) and Mosaic (built by Experian) assign a household-level profile to every UK address based on census data, property records, financial data, and consumer survey data. You can select only addresses in postcode sectors whose dominant geodemographic profile matches your target customer type.
In practice, a regional energy supplier running a PAM campaign for a heat-pump grant offer might select postcodes in sectors where owner-occupier rates are high, average property age is pre-1980, and household income is in the middle two quintiles. None of that selection requires a named individual or a personal data record. You are choosing delivery points, not people. For more on how postcode-level data attributes can inform targeting, see our guide to UK consumer data by postcode.
What are the main use cases for PAM?
PAM suits a specific set of campaign objectives well. It is not the right format for every direct mail application, but where it fits it fits well.
High-volume acquisition at controlled cost
For any campaign that needs to reach hundreds of thousands of households at a cost-per-item that works commercially, PAM is frequently the most practical format. Financial services firms running awareness campaigns, energy suppliers promoting tariff switches, telecoms providers entering a new exchange area, and subscription businesses building coverage in new geographies all use PAM for this reason. The postage saving of 20% to 35% against Advertising Mail is significant at scale: on a 500,000-item campaign, the reduction in postage alone can comfortably offset the spend on a PAF address build and MPS suppression.
Awareness campaigns where personalisation adds limited value
A named salutation lifts response in some contexts, particularly for financial offers where personalisation signals that you have relevant account information. In other contexts, the personalisation is largely irrelevant to the reader. A local restaurant promoting a new takeaway menu, a charity seeking new door-to-door donors in an area, or a retailer announcing a new store opening are all cases where "Dear Resident" performs almost identically to "Dear Mr Jones". PAM frees the budget for better creative, a larger format, or a higher-quality paper stock.
Lookalike geography targeting
This is, in our experience, the most consistently effective PAM use case for growth-stage businesses. You profile your existing highest-value customers by their postcode sector, identify the geodemographic characteristics of those sectors, then run a PAM campaign to postcode sectors elsewhere in the UK that share those characteristics. A Bristol-based home-security firm with a strong customer base in BS9 and BS10, for example, might identify similar owner-occupier, mid-income, 1970s-built-stock postcode sectors in Bristol's suburbs and expand into them with PAM at a cost that would not be viable with fully addressed Advertising Mail.
The approach requires a reasonably sized existing customer file to profile from, typically at least 2,000 to 3,000 records, so you get statistically meaningful postcode-sector distributions. With that base, a PAM lookalike campaign can move faster than a name-and-address campaign because you bypass the data acquisition step entirely; you are building from PAF, not from a purchased list of named individuals.
Re-engagement of lapsed geographic areas
Businesses that operate by geography (delivery zones, service areas, local branches) sometimes find that certain postcode sectors have underperformed over time without an obvious cause. A PAM campaign targeting those sectors specifically can test whether the issue is brand awareness rather than product-market fit. Because PAM can be scoped tightly to a handful of postcode sectors, the test budget is controllable.
GDPR considerations: is PAM lower-risk than named-contact mail?
PAM's data-protection profile is genuinely simpler than fully addressed Advertising Mail in one key respect: the mail piece itself does not carry personal data about a named individual. Under UK GDPR, a postal address alone is generally not personal data unless it can be readily linked back to an identified person (for example, if your internal records associate that address with a named customer). A PAF-sourced address with a generic greeting is not, on its face, processing personal data about the occupant.
That said, the campaign planning stage may involve personal data even if the item itself does not. If you build your targeting model by profiling named customers from your CRM, the profiling activity engages UK GDPR. If you use third-party geodemographic data derived from named-individual research, the firm supplying that data has its own lawful-basis obligations. What PAM does is remove the data-processing complexity at the point of mailing: you hand a list of addresses to your printer, not a list of names.
MPS suppression is required regardless of the GDPR position. The Mailing Preference Service is an industry opt-out register recognised in ICO guidance as a practical mechanism for respecting consumer marketing preferences. Any business sending PAM that skips MPS suppression is not only breaching Royal Mail's product terms; it is also creating ICO complaint risk, because the ICO has consistently treated non-suppression against MPS as evidence of insufficient care in direct marketing operations.
For campaigns targeting business addresses (a less common but legitimate PAM use), TPS suppression does not apply to postal mail, but the question of whether the business has indicated a preference against unsolicited mail should still be considered in any legitimate interests assessment.
PAM and Royal Mail tariff context
PAM pricing is set within Royal Mail's broader Advertising Mail tariff structure. Rates vary by format (letter vs large letter vs flat), weight band, and volume tier. For a current schedule of costs and to understand how PAM rates compare across formats, see our overview of Royal Mail tariffs for marketing mail.
When PAM is not the right choice
PAM has clear limits. If your offer depends on personalisation to convert (a credit offer quoting an individual's pre-approved limit, a renewal notice citing a policy number, or any communication that requires the recipient to believe you already know them), PAM will underperform against fully addressed Advertising Mail significantly enough that the postage saving will not compensate.
If your target audience is small, PAM's 1,000-item minimum creates a problem. A campaign targeting 400 company directors in a specific industrial park is not viable as PAM. That is a fully addressed, named-contact campaign using a B2B direct mail list, not a PAM build from PAF.
If you want to reach every household in a postcode walk regardless of property type or MPS registration status, Door to Door is cheaper still and has no MPS requirement, since it is entirely unaddressed. PAM's cost advantage over Door to Door exists only when your targeting logic requires excluding specific delivery points; if it does not, you are paying for targeting precision you are not using.